<unk> es usually have a<unk> st onset (from seconds to one hour) and may include: * Rash * Hives * Itching of mouth, lips, tongue, throat, eyes, skin, or other areas * Swelling (angioedema) of lips, tongue, eyelids, or the whole<unk> ce * Difficulty swallowing * Runny or congested nose * Hoarse voice * Wheezing and/or shortness of breath * Diarrhea, abdominal pain, and/or stomach cramps * Lightheadedness *<unk> inting * Nausea * Vomiting In some cases, however, onset of symptoms may be delayed for hours. Symptoms can vary. The amount of<unk>  needed to trigger a reaction also varies. Serious danger regarding allergies can begin when the respiratory tract or blood circulation is affected. The former can be indicated through wheezing and cyanosis. Poor blood circulation leads to a weak pulse, pale skin and<unk> inting. A severe case of an allergic reaction, caused by symptoms affecting the respiratory tract and blood circulation, is called anaphylaxis. When symptoms are related to a drop in blood pressure, the person is said to be in anaphylactic shock. Anaphylaxis occurs when IgE antibodies are involved, and areas of the body that are not in direct contact with the<unk>  become affected and show symptoms. Those with asthma or an allergy to peanuts, tree nuts, or seafood are at greater risk for anaphylaxis.
Food allergy
Coeliac disease
Metal allergy
Foodborne illness
Nickel allergy
Food intolerance
Poultry allergy
Sesame allergy