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Allergy symptoms vary, but may include: Breathing problems (coughing, shortness of breath) Burning, tearing, or itchy eyes Conjunctivitis (red, swollen eyes) Coughing Diarrhea Headache Hives Itching of the nose, mouth, throat, skin, or any other area Runny nose Skin rashes Stomach cramps Vomiting Wheezing What part of the body is contacted by the allergen plays a role in the symptoms you develop. For example: Allergens that are breathed in often cause a stuffy nose, itchy nose and throat, mucus production, cough, or wheezing. Allergens that touch the eyes may cause itchy, watery, red, swollen eyes. Eating something you are allergic to can cause nausea, vomiting, abdominal pain, cramping, diarrhea, or a severe, life-threatening reaction. Allergens that touch the skin can cause a skin rash, hives, itching, blisters, or even skin peeling. Drug allergies usually involve the whole body and can lead to a variety of symptoms.	Answer this question truthfully	What are the symptoms of Allergy?	Allergy symptoms vary, but may include: Breathing problems (coughing, shortness of breath) Burning, tearing, or itchy eyes Conjunctivitis (red, swollen eyes) {{ORGANIZATION}} of the nose, mouth, throat, skin, or any other area {{NAME}} nose Skin rashes Stomach cramps {{NAME}} What part of the body is contacted by the allergen plays a role in the symptoms you develop. For example: Allergens that are breathed in often cause a stuffy nose, itchy nose and throat, mucus production, cough, or wheezing. Allergens that touch the eyes may cause itchy, watery, red, swollen eyes. Eating something you are allergic to can cause nausea, vomiting, abdominal pain, cramping, diarrhea, or a severe, life-threatening reaction. Allergens that touch the skin can cause a skin rash, hives, itching, blisters, or even skin peeling. Drug allergies usually involve the whole body and can lead to a variety of symptoms.
The immune system normally protects the body against harmful substances, such as bacteria and viruses. It also reacts to foreign substances called allergens, which are generally harmless and in most people do not cause a problem.But in a person with allergies, the immune response is oversensitive. When it recognizes an allergen, it releases chemicals such as histamines. which fight off the allergen. This causes itching, swelling, mucus production, muscle spasms, hives, rashes, and other symptoms, which vary from person to person. Common allergens include pollen, mold, pet dander, and dust. Food and drug allergies are common. Allergic reactions can also be caused by insect bites, jewelry, cosmetics, spices, and other substances.Some people have allergy-like reactions to hot or cold temperatures, sunlight, or other environmental triggers. Sometimes, friction (rubbing or roughly stroking the skin) will cause symptoms.A specific allergy is not usually passed down through families (inherited). However, if both your parents have allergies, you are likely to have allergies. The chance is greater if your mother has allergies. Allergies may make certain medical conditions such as sinus problems, eczema, and asthma worse.Allergies are relatively common. Both genetics and environmental factors play a role.	Answer this question truthfully	What causes Allergy?	The immune system normally protects the body against harmful substances, such as bacteria and viruses. It also reacts to foreign substances called allergens, which are generally harmless and in most people do not cause a problem.But in a person with allergies, the immune response is oversensitive. When it recognizes an allergen, it releases chemicals such as histamines. which fight off the allergen. This causes itching, swelling, mucus production, muscle spasms, hives, rashes, and other symptoms, which vary from person to person. Common allergens include pollen, mold, pet dander, and dust. Food and drug allergies are common. Allergic reactions can also be caused by insect bites, jewelry, cosmetics, spices, and other substances.Some people have allergy-like reactions to hot or cold temperatures, sunlight, or other environmental triggers. Sometimes, friction (rubbing or roughly stroking the skin) will cause symptoms.A specific allergy is not usually passed down through families (inherited). However, if both your parents have allergies, you are likely to have allergies. The chance is greater if your mother has allergies. Allergies may make certain medical conditions such as sinus problems, eczema, and asthma worse.Allergies are relatively common. Both genetics and environmental factors play a role.
Call for an appointment with your health care provider if: Severe symptoms of allergy occur. Treatment for allergies no longer works.	Answer this question truthfully	When to seek urgent medical care when I have Allergy ?	Call for an appointment with your health care provider if: Severe symptoms of allergy occur. Treatment for allergies no longer works.
Most allergies can be easily treated with medication. Some children may outgrow an allergy. This is particularly true of food allergies. However, as a general rule, once a substance has triggered an allergic reaction, it continues to affect the person. Allergy shots are most effective when used to treat those with hay fever symptoms and severe insect sting allergies. They are not used to treat food allergies because of the danger of a severe reaction. Allergy shots may require years of treatment, but they work in most cases. However, they may cause uncomfortable side effects (such as hives and rash) and dangerous outcomes (such as anaphylaxis).	Answer this question truthfully	What to expect if I have Allergy (Outlook/Prognosis)?	Most allergies can be easily treated with medication. Some children may outgrow an allergy. This is particularly true of food allergies. However, as a general rule, once a substance has triggered an allergic reaction, it continues to affect the person. Allergy shots are most effective when used to treat those with hay fever symptoms and severe insect sting allergies. They are not used to treat food allergies because of the danger of a severe reaction. Allergy shots may require years of treatment, but they work in most cases. However, they may cause uncomfortable side effects (such as hives and rash) and dangerous outcomes (such as anaphylaxis).
Symptoms develop rapidly, often within seconds or minutes. They may include the following: Abdominal pain or cramping Abnormal (high-pitched) breathing sounds Anxiety Confusion Cough Diarrhea Difficulty breathing Difficulty swallowing Fainting, light-headedness, dizziness Hives, itchiness Nasal congestion Nausea, vomiting Palpitations Skin redness Slurred speech Wheezing	Answer this question truthfully	What are the symptoms of Anaphylaxis?	Symptoms develop rapidly, often within seconds or minutes. They may include the following: Abdominal pain or cramping {{NAME}} (high-pitched) breathing sounds {{ORGANIZATION}} breathing Difficulty swallowing Fainting, light-headedness, dizziness Hives, itchiness Nasal congestion Nausea, vomiting Palpitations Skin redness Slurred speech {{NAME}}
Anaphylaxis is a severe, whole-body allergic reaction to a chemical that has become an allergen. After being exposed to a substance such as bee sting venom, the person's immune system becomes sensitized to it. On a later exposure to that allergen, an allergic reaction may occur. This reaction happens quickly after the exposure, is severe, and involves the whole body. Tissues in different parts of the body release histamine and other substances. This causes the airways to tighten and leads to other symptoms. Some drugs (morphine, x-ray dye, and others) may cause an anaphylactic-like reaction (anaphylactoid reaction) when people are first exposed to them. Aspirin may also cause a reaction. These reactions are not the same as the immune system response that occurs with "true" anaphylaxis. However, the symptoms, risk for complications, and treatment are the same for both types of reactions. Anaphylaxis can occur in response to any allergen. Common causes include: Drug allergies Food allergies Insect bites/stings Pollens and other inhaled allergens rarely cause anaphylaxis. Some people have an anaphylactic reaction with no known cause. Anaphylaxis is life-threatening and can occur at any time. Risks include a history of any type of allergic reaction.	Answer this question truthfully	What causes Anaphylaxis?	Anaphylaxis is a severe, whole-body allergic reaction to a chemical that has become an allergen. After being exposed to a substance such as bee sting venom, the person's immune system becomes sensitized to it. On a later exposure to that allergen, an allergic reaction may occur. This reaction happens quickly after the exposure, is severe, and involves the whole body. Tissues in different parts of the body release histamine and other substances. This causes the airways to tighten and leads to other symptoms. Some drugs (morphine, x-ray dye, and others) may cause an anaphylactic-like reaction (anaphylactoid reaction) when people are first exposed to them. {{NAME}} may also cause a reaction. These reactions are not the same as the immune system response that occurs with "true" anaphylaxis. However, the symptoms, risk for complications, and treatment are the same for both types of reactions. Anaphylaxis can occur in response to any allergen. Common causes include: Drug allergies Food allergies {{ORGANIZATION}} bites/stings Pollens and other inhaled allergens rarely cause anaphylaxis. Some people have an anaphylactic reaction with no known cause. Anaphylaxis is life-threatening and can occur at any time. Risks include a history of any type of allergic reaction.
Call 911 if you develop severe symptoms of anaphylaxis. If you are with another person, he or she may take you to the nearest emergency room.	Answer this question truthfully	When to seek urgent medical care when I have Anaphylaxis ?	Call 911 if you develop severe symptoms of anaphylaxis. If you are with another person, he or she may take you to the nearest emergency room.
Anaphylaxis is a severe disorder that can be life-threatening without prompt treatment. However, symptoms usually get better with the right therapy, so it is important to act right away.	Answer this question truthfully	What to expect if I have Anaphylaxis (Outlook/Prognosis)?	Anaphylaxis is a severe disorder that can be life-threatening without prompt treatment. However, symptoms usually get better with the right therapy, so it is important to act right away.
The main symptom is sudden swelling below the skin surface. You may also develop welts or swelling on the surface of your skin. The swelling usually occurs around the eyes and lips. It may also be found on the hands, feet, and throat. The swelling may form a line or be more spread out. The welts are painful and may be itchy. They turn pale and swell if irritated. The deeper swelling of angioedema may also be painful. Other symptoms may include: Abdominal cramping. Breathing difficulty. Swollen eyes and mouth. Swollen lining of the eyes (chemosis).	Answer this question truthfully	What are the symptoms of Angioedema?	The main symptom is sudden swelling below the skin surface. You may also develop welts or swelling on the surface of your skin. The swelling usually occurs around the eyes and lips. It may also be found on the hands, feet, and throat. The swelling may form a line or be more spread out. The welts are painful and may be itchy. They turn pale and swell if irritated. The deeper swelling of angioedema may also be painful. Other symptoms may include: Abdominal cramping. Breathing difficulty. Swollen eyes and mouth. Swollen lining of the eyes (chemosis).
Angioedema may be caused by an allergic reaction. During the reaction, histamine and other chemicals are released into the bloodstream. The body releases histamine when the immune system detects a foreign substance called an allergen. In many cases, the cause of angioedema is never found. The following may cause angioedema: Animal dander (scales of shed skin). Exposure to water, sunlight, cold or heat. Foods (such as berries, shellfish, fish, nuts, eggs, milk, and others). Insect bites. Medications (drug allergy), such as antibiotics (penicillin and sulfa drugs), nonsteroidal anti-inflammatory drugs (NSAIDs), and blood pressure medicines (ACE inhibitors). Pollen. Hives and angioedema may also occur after infections or with other illnesses (including autoimmune disorders such as lupus, and leukemia and lymphoma). A form of angioedema runs in families and has different triggers, complications, and treatments. This is called hereditary angioedema, and it is not discussed in this article.	Answer this question truthfully	What causes Angioedema?	{{NAME}} may be caused by an allergic reaction. During the reaction, histamine and other chemicals are released into the bloodstream. The body releases histamine when the immune system detects a foreign substance called an allergen. In many cases, the cause of angioedema is never found. The following may cause angioedema: Animal dander (scales of shed skin). Exposure to water, sunlight, cold or heat. Foods (such as berries, shellfish, fish, nuts, eggs, milk, and others). Insect bites. Medications (drug allergy), such as antibiotics (penicillin and sulfa drugs), nonsteroidal anti-inflammatory drugs (NSAIDs), and blood pressure medicines ({{ORGANIZATION}} inhibitors). Pollen. Hives and angioedema may also occur after infections or with other illnesses (including autoimmune disorders such as lupus, and leukemia and lymphoma). A form of angioedema runs in families and has different triggers, complications, and treatments. This is called hereditary angioedema, and it is not discussed in this article.
Call your health care provider if: Angioedema does not respond to treatment It is severe You have never had angioedema before Go to the emergency room or call the local emergency number (such as 911) if you have: Abnormal breathing sounds (stridor) Difficulty breathing Fainting Wheezing	Answer this question truthfully	When to seek urgent medical care when I have Angioedema ?	Call your health care provider if: {{NAME}} does not respond to treatment It is severe You have never had angioedema before Go to the emergency room or call the local emergency number (such as 911) if you have: Abnormal breathing sounds (stridor) Difficulty breathing {{NAME}}
Angioedema that does not affect the breathing may be uncomfortable, but is usually harmless and goes away in a few days.	Answer this question truthfully	What to expect if I have Angioedema (Outlook/Prognosis)?	{{NAME}} that does not affect the breathing may be uncomfortable, but is usually harmless and goes away in a few days.
Most people with asthma have attacks separated by symptom-free periods. Some people have long-term shortness of breath with episodes of increased shortness of breath. Either wheezing or a cough may be the main symptom. Asthma attacks can last for minutes to days, and can become dangerous if the airflow is severely restricted. Cough with or without sputum (phlegm) production Pulling in of the skin between the ribs when breathing (intercostal retractions) Shortness of breath that gets worse with exercise or activity Wheezing: Comes in episodes with symptom-free periods in between May be worse at night or in early morning May go away on its own Gets better when using drugs that open the airways (bronchodilators) Gets worse when breathing in cold air Gets worse with exercise Gets worse with heartburn (reflux) Usually begins suddenly Bluish color to the lips and face Decreased level of alertness such as severe drowsiness or confusion, during an asthma attack Extreme difficulty breathing Rapid pulse Severe anxiety due to shortness of breath Sweating Abnormal breathing pattern (breathing out takes more than twice as long as breathing in) Breathing temporarily stops Chest pain Nasal flaring Tightness in the chest	Answer this question truthfully	What are the symptoms of Asthma?	Most people with asthma have attacks separated by symptom-free periods. Some people have long-term shortness of breath with episodes of increased shortness of breath. Either wheezing or a cough may be the main symptom. Asthma attacks can last for minutes to days, and can become dangerous if the airflow is severely restricted. Cough with or without sputum (phlegm) production Pulling in of the skin between the ribs when breathing (intercostal retractions) Shortness of breath that gets worse with exercise or activity Wheezing: Comes in episodes with symptom-free periods in between May be worse at night or in early morning May go away on its own Gets better when using drugs that open the airways (bronchodilators) Gets worse when breathing in cold air Gets worse with exercise Gets worse with heartburn (reflux) Usually begins suddenly Bluish color to the lips and face {{NAME}} level of alertness such as severe drowsiness or confusion, during an asthma attack Extreme difficulty breathing Rapid pulse Severe anxiety due to shortness of breath Sweating Abnormal breathing pattern (breathing out takes more than twice as long as breathing in) Breathing temporarily stops Chest pain Nasal flaring Tightness in the chest
Asthma is caused by inflammation in the airways. When an asthma attack occurs, the muscles surrounding the airways become tight and the lining of the air passages swells. This reduces the amount of air that can pass by. In sensitive individuals, asthma symptoms can be triggered by breathing in allergy-causing substances (called allergens or triggers). Common asthma triggers include: Animals (pet hair or dander) Dust Changes in weather (most often cold weather) Chemicals in the air or in food Exercise Mold Pollen Respiratory infections, such as the common cold Strong emotions (stress) Tobacco smoke Aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs) provoke asthma in some patients.	Answer this question truthfully	What causes Asthma?	Asthma is caused by inflammation in the airways. When an asthma attack occurs, the muscles surrounding the airways become tight and the lining of the air passages swells. This reduces the amount of air that can pass by. In sensitive individuals, asthma symptoms can be triggered by breathing in allergy-causing substances (called allergens or triggers). Common asthma triggers include: Animals (pet hair or dander) Dust Changes in weather (most often cold weather) Chemicals in the air or in food Exercise Mold Pollen Respiratory infections, such as the common cold Strong emotions (stress) Tobacco smoke Aspirin and other nonsteroidal anti-inflammatory drugs ({{ORGANIZATION}}) provoke asthma in some patients.
Many people with asthma have an individual or family history of allergies, such as hay fever (allergic rhinitis) or eczema. Others have no history of allergies.	Answer this question truthfully	Who is at highest risk for Asthma ?	Many people with asthma have an individual or family history of allergies, such as hay fever (allergic rhinitis) or eczema. Others have no history of allergies.
Call for an appointment with your health care provider if asthma symptoms develop. Call your health care provider or go to the emergency room if: An asthma attack requires more medication than recommended Symptoms get worse or do not improve with treatment You have shortness of breath while talking Your peak flow measurement is 50-80% of your personal best Go to the emergency room if: Drowsiness or confusion develops There is severe shortness of breath at rest The peak flow measurement is less than 50% of your personal best You have severe chest pain	Answer this question truthfully	When to seek urgent medical care when I have Asthma ?	Call for an appointment with your health care provider if asthma symptoms develop. Call your health care provider or go to the emergency room if: An asthma attack requires more medication than recommended Symptoms get worse or do not improve with treatment You have shortness of breath while talking Your peak flow measurement is 50-80% of your personal best Go to the emergency room if: Drowsiness or confusion develops There is severe shortness of breath at rest The peak flow measurement is less than 50% of your personal best You have severe chest pain
There is no cure for asthma, although symptoms sometimes improve over time. With proper self management and medical treatment, most people with asthma can lead normal lives.	Answer this question truthfully	What to expect if I have Asthma (Outlook/Prognosis)?	There is no cure for asthma, although symptoms sometimes improve over time. With proper self management and medical treatment, most people with asthma can lead normal lives.
Dermatitis herpetiformis is usually extremely itchy. The bumps or blisters usually appear on the elbows, knees, back, and buttocks. In most cases, the rash is the same size and shape on both sides. Symptoms of dermatitis herpetiformis tend to come and go.	Answer this question truthfully	What are the symptoms of dermatitis herpetiformis?	{{ORGANIZATION}} herpetiformis is usually extremely itchy. The bumps or blisters usually appear on the elbows, knees, back, and buttocks. In most cases, the rash is the same size and shape on both sides. Symptoms of dermatitis herpetiformis tend to come and go.
The cause is unknown. However, dermatitis herpetiformis is frequently linked to gluten sensitivity (celiac sprue disease) in the small bowel.	Answer this question truthfully	What causes dermatitis herpetiformis?	The cause is unknown. However, dermatitis herpetiformis is frequently linked to gluten sensitivity (celiac sprue disease) in the small bowel.
Dermatitis herpetiformis occurs in both men and women, usually of age 20 years and older. Although children may be sometimes affected.	Answer this question truthfully	Who is at highest risk for Dermatitis herpetiformis ?	{{ORGANIZATION}} herpetiformis occurs in both men and women, usually of age 20 years and older. Although children may be sometimes affected.
Call your health care provider if the rash is non- resolving despite of the treatment.	Answer this question truthfully	When to seek urgent medical care when I have Dermatitis herpetiformis ?	Call your health care provider if the rash is non- resolving despite of the treatment.
Dermatitis herpetiformis is an autoimmune disorder which is strongly associated with celiac disease, which also affects the small intestine. The rash can be controlled with gluten free diet and an inability to adhere to the diet increase the risk of intestinal cancer.	Answer this question truthfully	What to expect if I have Dermatitis herpetiformis (Outlook/Prognosis)?	{{ORGANIZATION}} herpetiformis is an autoimmune disorder which is strongly associated with celiac disease, which also affects the small intestine. The rash can be controlled with gluten free diet and an inability to adhere to the diet increase the risk of intestinal cancer.
Anaphylaxis, or severe allergic reaction (see below). Hives. Itching of the skin or eyes (common). Skin rash (common). Swelling of the lips, tongue, or face. Wheezing. Symptoms of anaphylaxis include: Abdominal pain or cramping. Confusion. Diarrhea. Difficulty breathing with wheeze or hoarse voice. Dizziness. Fainting, lightheadedness. Hives over different parts of the body. Nausea, vomiting. Rapid pulse. Sensation of feeling the heart beat (palpitations).	Answer this question truthfully	What are the symptoms of Drug allergy?	Anaphylaxis, or severe allergic reaction (see below). Hives. Itching of the skin or eyes (common). {{NAME}} rash (common). Swelling of the lips, tongue, or face. Wheezing. Symptoms of anaphylaxis include: Abdominal pain or cramping. Confusion. Diarrhea. Difficulty breathing with wheeze or hoarse voice. Dizziness. Fainting, lightheadedness. Hives over different parts of the body. Nausea, vomiting. Rapid pulse. Sensation of feeling the heart beat (palpitations).
Adverse reactions to drugs are common, and almost any drug can cause an adverse reaction. Reactions range from irritating or mild side effects such as nausea and vomiting to life-threatening anaphylaxis. A true drug allergy results from a series of chemical steps within the body that produce the allergic reaction to a medication. It can develop two different ways: The first time you take the medicine, you have no problems, but your body's immune system produces a substance (antibody) called IgE against that drug. The next time you take the drug, the IgE tells your white blood cells to make a chemical called histamine, which causes your allergy symptoms. A drug allergy may also occur without your body producing IgE, but this is not well understood. Most drug allergies cause minor skin rashes and hives. Serum sickness is a delayed type of drug allergy that occurs a week or more after exposure to a medication or vaccine. Penicillin and related antibiotics are the most common cause of drug allergies. Other common allergy-causing drugs include: Sulfa drugs. Anticonvulsants. Insulin preparations (particularly animal sources of insulin). Iodinated (containing iodine) x-ray contrast dyes (these can cause allergy-like anaphylactoid reactions). Most side effects of drugs are not due to an allergic reaction. For example, aspirin can cause nonallergic hives or trigger asthma. Some drug reactions are considered "idiosyncratic." This means the reaction is an unusual effect of the medication, not due to a predictable chemical effect of the drug. Many people confuse an uncomfortable, but not serious, side effect of a medicine (such as nausea) with a true drug allergy, which can be life threatening.	Answer this question truthfully	What causes Drug allergy?	Adverse reactions to drugs are common, and almost any drug can cause an adverse reaction. Reactions range from irritating or mild side effects such as nausea and vomiting to life-threatening anaphylaxis. A true drug allergy results from a series of chemical steps within the body that produce the allergic reaction to a medication. It can develop two different ways: The first time you take the medicine, you have no problems, but your body's immune system produces a substance (antibody) called IgE against that drug. The next time you take the drug, the IgE tells your white blood cells to make a chemical called histamine, which causes your allergy symptoms. A drug allergy may also occur without your body producing IgE, but this is not well understood. Most drug allergies cause minor skin rashes and hives. Serum sickness is a delayed type of drug allergy that occurs a week or more after exposure to a medication or vaccine. Penicillin and related antibiotics are the most common cause of drug allergies. Other common allergy-causing drugs include: Sulfa drugs. Anticonvulsants. Insulin preparations (particularly animal sources of insulin). Iodinated (containing iodine) x-ray contrast dyes (these can cause allergy-like {{ORGANIZATION}} reactions). Most side effects of drugs are not due to an allergic reaction. For example, aspirin can cause nonallergic hives or trigger asthma. Some drug reactions are considered "idiosyncratic." This means the reaction is an unusual effect of the medication, not due to a predictable chemical effect of the drug. Many people confuse an uncomfortable, but not serious, side effect of a medicine (such as nausea) with a true drug allergy, which can be life threatening.
Call your health care provider if you are taking a medication and seem to be having a reaction to it. Go to the emergency room or call the local emergency number (such as 911) if you have difficulty breathing or develop other symptoms of severe asthma or anaphylaxis. These are emergency conditions.	Answer this question truthfully	When to seek urgent medical care when I have Drug allergy ?	Call your health care provider if you are taking a medication and seem to be having a reaction to it. Go to the emergency room or call the local emergency number (such as 911) if you have difficulty breathing or develop other symptoms of severe asthma or anaphylaxis. These are emergency conditions.
Most drug allergies respond readily to treatment. A few cases cause severe asthma, anaphylaxis, or death.	Answer this question truthfully	What to expect if I have Drug allergy (Outlook/Prognosis)?	Most drug allergies respond readily to treatment. A few cases cause severe asthma, anaphylaxis, or death.
Symptoms usually begin immediately, within 2 hours after eating. Rarely, the symptoms may begin hours after eating the offending food. If you develop symptoms shortly after eating a specific food, you may have a food allergy. Key symptoms include hives, hoarse voice, and wheezing. Other symptoms that may occur include: Abdominal pain. Diarrhea. Difficulty swallowing. Itching of the mouth, throat, eyes, skin, or any area. Lightheadedness or fainting. Nasal congestion. Nausea. Runny nose. Patches of itchy, scaly skin (atopic dermatitis); skin may peel or blister. Swelling (angioedema), especially of the eyelids, face, lips, and tongue. Shortness of breath. Stomach cramps. Vomiting. Symptoms of mouth (oral) allergy syndrome: Itchy lips, tongue, and throat. Swollen lips (sometimes).	Answer this question truthfully	What are the symptoms of Food allergy?	Symptoms usually begin immediately, within 2 hours after eating. Rarely, the symptoms may begin hours after eating the offending food. If you develop symptoms shortly after eating a specific food, you may have a food allergy. Key symptoms include hives, hoarse voice, and wheezing. Other symptoms that may occur include: Abdominal pain. Diarrhea. Difficulty swallowing. Itching of the mouth, throat, eyes, skin, or any area. Lightheadedness or fainting. Nasal congestion. Nausea. Runny nose. Patches of itchy, scaly skin (atopic dermatitis); skin may peel or blister. Swelling (angioedema), especially of the eyelids, face, lips, and tongue. Shortness of breath. Stomach cramps. Vomiting. Symptoms of mouth (oral) allergy syndrome: Itchy lips, tongue, and throat. Swollen lips (sometimes).
Normally, your body's immune system defends against potentially harmful substances, such as bacteria, viruses, and toxins. In some people, an immune response is triggered by a substance that is generally harmless, such as a specific food. The cause of food allergies is related to your body making a type of allergy-producing substance called immunoglobulin E (IgE) antibodies to a particular food. Although many people have a food intolerance, food allergies are less common. In a true food allergy, the immune system produces antibodies and histamine in response to the specific food. Any food can cause an allergic reaction, but a few foods are the main culprits. In children, the most common food allergies are to: Eggs. Milk. Peanuts. Shellfish (shrimp, crab, lobster). Soy. Tree nuts. Wheat. A food allergy frequently starts in childhood, but it can begin at any age. Fortunately, many children will outgrow their allergy to milk, egg, wheat, and soy by the time they are 5 years old if they avoid the offending foods when they are young. Allergies to peanuts, tree nuts, and shellfish tend to be lifelong. In older children and adults, the most common food allergies are: Fish. Peanuts. Shellfish. Tree nuts. Food additives -- such as dyes, thickeners, and preservatives – may rarely cause an allergic or intolerance reaction. An allergy syndrome that affects the mouth and tongue may occur after eating certain fresh fruits and vegetables. These foods contain substances similar to certain pollens. For example, melon contains substances similar to ragweed pollen, and apples have allergens similar to tree pollen. Many Americans believe they have food allergies, while in reality fewer than 1% have true allergies. Most symptoms are caused by intolerances to foods such as: Corn products. Cow's milk and dairy products. Wheat and other gluten-containing grains.	Answer this question truthfully	What causes Food allergy?	Normally, your body's immune system defends against potentially harmful substances, such as bacteria, viruses, and toxins. In some people, an immune response is triggered by a substance that is generally harmless, such as a specific food. The cause of food allergies is related to your body making a type of allergy-producing substance called immunoglobulin E (IgE) antibodies to a particular food. Although many people have a food intolerance, food allergies are less common. In a true food allergy, the immune system produces antibodies and histamine in response to the specific food. Any food can cause an allergic reaction, but a few foods are the main culprits. In children, the most common food allergies are to: Eggs. Milk. Peanuts. Shellfish (shrimp, crab, lobster). {{NAME}}. Tree nuts. Wheat. A food allergy frequently starts in childhood, but it can begin at any age. Fortunately, many children will outgrow their allergy to milk, egg, wheat, and soy by the time they are 5 years old if they avoid the offending foods when they are young. Allergies to peanuts, tree nuts, and shellfish tend to be lifelong. In older children and adults, the most common food allergies are: Fish. Peanuts. Shellfish. Tree nuts. Food additives -- such as dyes, thickeners, and preservatives – may rarely cause an allergic or intolerance reaction. An allergy syndrome that affects the mouth and tongue may occur after eating certain fresh fruits and vegetables. These foods contain substances similar to certain pollens. For example, melon contains substances similar to ragweed pollen, and apples have allergens similar to tree pollen. Many Americans believe they have food allergies, while in reality fewer than 1% have true allergies. Most symptoms are caused by intolerances to foods such as: Corn products. Cow's milk and dairy products. Wheat and other gluten-containing grains.
Call your local emergency number, such as 911, if you have any serious or whole-body reactions (particularly wheezing or difficulty breathing) after eating a food. If your doctor prescribed epinephrine for severe reactions, inject it as soon as possible, even before calling 911. The sooner you inject the epinephrine, the better. Anyone who has had an allergic reaction to a food should be evaluated by an allergy specialist.	Answer this question truthfully	When to seek urgent medical care when I have Food allergy ?	Call your local emergency number, such as 911, if you have any serious or whole-body reactions (particularly wheezing or difficulty breathing) after eating a food. If your doctor prescribed epinephrine for severe reactions, inject it as soon as possible, even before calling 911. The sooner you inject the epinephrine, the better. Anyone who has had an allergic reaction to a food should be evaluated by an allergy specialist.
Avoiding the offending foods may be easy if the food is uncommon or easily identified. However, you may need to severely restrict your diet, carefully read all package ingredients, and ask detailed questions when eating away from home.	Answer this question truthfully	What to expect if I have Food allergy (Outlook/Prognosis)?	Avoiding the offending foods may be easy if the food is uncommon or easily identified. However, you may need to severely restrict your diet, carefully read all package ingredients, and ask detailed questions when eating away from home.
Symptoms that occur shortly after you come into contact with the substance you are allergic to may include: Itchy nose, mouth, eyes, throat, skin, or any area Problems with smell Runny nose Sneezing Tearing eyes Symptoms that may develop later include: Stuffy nose (nasal congestion) Coughing Clogged ears and decreased sense of smell Sore throat Dark circles under the eyes Puffiness under the eyes Fatigue and irritability Headache Memory problems and slowed thinking	Answer this question truthfully	What are the symptoms of Hay fever?	Symptoms that occur shortly after you come into contact with the substance you are allergic to may include: Itchy nose, mouth, eyes, throat, skin, or any area Problems with smell {{NAME}} nose Sneezing Tearing eyes Symptoms that may develop later include: Stuffy nose (nasal congestion) Coughing Clogged ears and decreased sense of smell Sore throat Dark circles under the eyes Puffiness under the eyes {{NAME}} and irritability Headache Memory problems and slowed thinking
An allergen is something that triggers an allergy. When a person with allergic rhinitis breathes in an allergen such as pollen or dust, the body releases chemicals, including histamine. This causes allergy symptoms such as itching, swelling, and mucus production. Hay fever involves an allergic reaction to pollen. (A similar reaction occurs with allergy to mold, animal dander, dust, and similar inhaled allergens.) The pollens that cause hay fever vary from person to person and from region to region. Large, visible pollens are seldom responsible for hay fever. Tiny, hard to see pollens more often cause hay fever. Examples of plants commonly responsible for hay fever include: Trees (deciduous and evergreen) Grasses Ragweed The amount of pollen in the air can play a role in whether hay fever symptoms develop. Hot, dry, windy days are more likely to have increased amounts of pollen in the air than cool, damp, rainy days when most pollen is washed to the ground. Some disorders may be associated with allergies. These include eczema and asthma. Allergies are common. Your genes and environment may make you more prone to allergies.	Answer this question truthfully	What causes Hay fever?	An allergen is something that triggers an allergy. When a person with allergic rhinitis breathes in an allergen such as pollen or dust, the body releases chemicals, including histamine. This causes allergy symptoms such as itching, swelling, and mucus production. Hay fever involves an allergic reaction to pollen. (A similar reaction occurs with allergy to mold, animal dander, dust, and similar inhaled allergens.) The pollens that cause hay fever vary from person to person and from region to region. Large, visible pollens are seldom responsible for hay fever. Tiny, hard to see pollens more often cause hay fever. Examples of plants commonly responsible for hay fever include: Trees (deciduous and evergreen) Grasses Ragweed The amount of pollen in the air can play a role in whether hay fever symptoms develop. Hot, dry, windy days are more likely to have increased amounts of pollen in the air than cool, damp, rainy days when most pollen is washed to the ground. Some disorders may be associated with allergies. These include eczema and asthma. Allergies are common. Your genes and environment may make you more prone to allergies.
Whether or not you are likely to develop allergies is often passed down through families. If both your parents have allergies, you are likely to have allergies. The chance is greater if your mother has allergies.	Answer this question truthfully	Who is at highest risk for Hay fever?	Whether or not you are likely to develop allergies is often passed down through families. If both your parents have allergies, you are likely to have allergies. The chance is greater if your mother has allergies.
Call for an appointment with your health care provider if severe symptoms of allergies or hay fever occur, if previously successful treatment has become ineffective, or if your symptoms do not respond to treatment.	Answer this question truthfully	When to seek urgent medical care when I have Hay fever ?	Call for an appointment with your health care provider if severe symptoms of allergies or hay fever occur, if previously successful treatment has become ineffective, or if your symptoms do not respond to treatment.
Most symptoms of allergic rhinitis can be treated. More severe cases require allergy shots. Some people (particularly children) may outgrow an allergy as the immune system becomes less sensitive to the allergen. However, as a general rule, once a substance causes allergies for an individual, it can continue to affect the person over the long term.	Answer this question truthfully	What to expect if I have Hay fever (Outlook/Prognosis)?	Most symptoms of allergic rhinitis can be treated. More severe cases require allergy shots. Some people (particularly children) may outgrow an allergy as the immune system becomes less sensitive to the allergen. However, as a general rule, once a substance causes allergies for an individual, it can continue to affect the person over the long term.
Symptoms of acute hypersensitivity pneumonitis may occur 4 - 6 hours after you have left the area where the foreign substance is found, making it difficult to find a connection between your activity and the disease. Symptoms may include: Chills. Cough. Fever. Malaise (feeling ill). Shortness of breath. Symptoms of chronic hypersensitivity pneumonitis may include: Breathlessness, especially with activity. Cough, often dry. Loss of appetite. Unintentional weight loss.	Answer this question truthfully	What are the symptoms of Hypersensitivity pneumonitis?	Symptoms of acute hypersensitivity pneumonitis may occur 4 - 6 hours after you have left the area where the foreign substance is found, making it difficult to find a connection between your activity and the disease. Symptoms may include: Chills. Cough. Fever. Malaise (feeling ill). Shortness of breath. Symptoms of chronic hypersensitivity pneumonitis may include: Breathlessness, especially with activity. Cough, often dry. Loss of appetite. Unintentional weight loss.
Hypersensitivity pneumonitis usually occurs in people who work in places where there are high levels of organic dusts, fungus, or molds. Bird fancier's lung is the most common type of hypersensitivity pneumonitis. It is caused by repeated or intense exposure to proteins found in the feathers or droppings of many species of birds. Farmer's lung is caused by exposure to dust from moldy hay, straw, and grain. These exposures can lead to lung inflammation and acute lung disease. Over time, this acute Hypersensitivity pneumonitis may turn into long-lasting (chronic) lung disease. Hypersensitivity pneumonitis may also be caused by fungi or bacteria in humidifiers, heating systems, and air Hypersensitivity pneumonitisers found in homes and offices. Exposure to certain chemicals, such as isocyanates or acid anhydrides, can also lead to hypersensitivity pneumonitis.	Answer this question truthfully	What causes Hypersensitivity pneumonitis?	Hypersensitivity pneumonitis usually occurs in people who work in places where there are high levels of organic dusts, fungus, or molds. Bird fancier's lung is the most common type of hypersensitivity pneumonitis. It is caused by repeated or intense exposure to proteins found in the feathers or droppings of many species of birds. Farmer's lung is caused by exposure to dust from moldy hay, straw, and grain. These exposures can lead to lung inflammation and acute lung disease. Over time, this acute Hypersensitivity pneumonitis may turn into long-lasting (chronic) lung disease. Hypersensitivity pneumonitis may also be caused by fungi or bacteria in humidifiers, heating systems, and air Hypersensitivity pneumonitisers found in homes and offices. Exposure to certain chemicals, such as isocyanates or acid anhydrides, can also lead to hypersensitivity pneumonitis.
Call your health care provider if you develop symptoms of hypersensitivity pneumonitis.	Answer this question truthfully	When to seek urgent medical care when I have Hypersensitivity pneumonitis ?	Call your health care provider if you develop symptoms of hypersensitivity pneumonitis.
Most symptoms go away when you avoid or limit your exposure to the material that caused the problem.	Answer this question truthfully	What to expect if I have Hypersensitivity pneumonitis (Outlook/Prognosis)?	Most symptoms go away when you avoid or limit your exposure to the material that caused the problem.
There are many methods of allergy testing. Among the more common are: Skin tests. Elimination-type tests. Blood tests (including the radioallergosorbent, or RAST, test). SKIN TESTS Skin tests are the most common. Specific methods vary. One of the most common methods is the prick test. This test involves placing a small amount of suspectedallergy-causing substances on the skin, usually the forearm, upper arm, or the back. Then, the skin is pricked so the allergen goes under the skin's surface. The health care provider closely watches the skin for signs of a reaction, usually swelling and redness of the site. Results are usually seen within 15-20 minutes. Several allergens can be tested at the same time. A similar method involves injecting a small amount of allergen into the skin and watching for a reaction at the site. This is called an intradermal skin test. It is more likely to be used when testing is being done to find out if you are allergy to something specific, such as bee venom or penicillin. Patch testing is a method to diagnose allergic reactions on the skin. Possible allergens are taped to the skin for 48 hours. The health care provider will look at the area in 24 hours, and then again 48 hours later. Skin tests are most useful for diagnosing: Food allergy. Mold, pollen, animal, and other allergies that cause allergic rhinitis and asthma. Penicillin allergy. Venom allergy. Allergic contact dermatitis. ELIMINATION TESTS An elimination diet can be used to check for food allergies. An elimination diet is one in which foods that may be causing symptoms are removed from the diet for several weeks and then slowly re-introduced one at a time while the person is watched for signs of an allergic reaction. BLOOD TESTS Blood tests can be done to measure the amount of immunoglobulin (Ig) E antibodies to a specific allergen in the blood. This test may be used when skin testing is not helpful or cannot be done Other blood tests include: Absolute eosinophil count. Total IgE level. PROVOCATION Provocation (challenge) testing involves exposing a person to a suspected allergen under controlled circumstances. This may be done in the diet or by breathing in the suspected allergen. This type of test may provoke severe allergic reactions. Challenge testing should only be done by a doctor. Another method is the double-blind test. This method involves giving foods and harmless substances in a disguised form. The person being tested and the provider are both unaware of whether the substance tested in that session is the harmless substance or the suspected food. A third party knows the identity of the substances and identifies them with some sort of code. This test requires several sessions if more than one substance is under investigation. While the double-blind strategy is useful and practical for mild allergic reactions, it must be done carefully in individuals with suspected severe reactions to foods. Blood tests may be a safer first approach. Skin tests may cause very mild discomfort when the skin is pricked. Itching may occur if you have a positive reaction to the allergen.	Answer this question truthfully	How is the Skin allergy testing done?	There are many methods of allergy testing. Among the more common are: Skin tests. Elimination-type tests. Blood tests (including the radioallergosorbent, or {{ORGANIZATION}}, test). SKIN TESTS Skin tests are the most common. Specific methods vary. One of the most common methods is the prick test. This test involves placing a small amount of suspectedallergy-causing substances on the skin, usually the forearm, upper arm, or the back. Then, the skin is pricked so the allergen goes under the skin's surface. The health care provider closely watches the skin for signs of a reaction, usually swelling and redness of the site. Results are usually seen within 15-20 minutes. Several allergens can be tested at the same time. A similar method involves injecting a small amount of allergen into the skin and watching for a reaction at the site. This is called an intradermal skin test. It is more likely to be used when testing is being done to find out if you are allergy to something specific, such as bee venom or penicillin. Patch testing is a method to diagnose allergic reactions on the skin. Possible allergens are taped to the skin for 48 hours. The health care provider will look at the area in 24 hours, and then again 48 hours later. Skin tests are most useful for diagnosing: Food allergy. {{NAME}}, pollen, animal, and other allergies that cause allergic rhinitis and asthma. {{ORGANIZATION}} allergy. {{ORGANIZATION}} allergy. {{ORGANIZATION}} contact dermatitis. ELIMINATION TESTS An elimination diet can be used to check for food allergies. An elimination diet is one in which foods that may be causing symptoms are removed from the diet for several weeks and then slowly re-introduced one at a time while the person is watched for signs of an allergic reaction. BLOOD TESTS Blood tests can be done to measure the amount of immunoglobulin (Ig) E antibodies to a specific allergen in the blood. This test may be used when skin testing is not helpful or cannot be done Other blood tests include: Absolute eosinophil count. Total IgE level. PROVOCATION Provocation (challenge) testing involves exposing a person to a suspected allergen under controlled circumstances. This may be done in the diet or by breathing in the suspected allergen. This type of test may provoke severe allergic reactions. Challenge testing should only be done by a doctor. Another method is the double-blind test. This method involves giving foods and harmless substances in a disguised form. The person being tested and the provider are both unaware of whether the substance tested in that session is the harmless substance or the suspected food. A third party knows the identity of the substances and identifies them with some sort of code. This test requires several sessions if more than one substance is under investigation. While the double-blind strategy is useful and practical for mild allergic reactions, it must be done carefully in individuals with suspected severe reactions to foods. Blood tests may be a safer first approach. Skin tests may cause very mild discomfort when the skin is pricked. Itching may occur if you have a positive reaction to the allergen.