Hives on back Acute<unk>  can have fast onset (from seconds to one hour) or slow onset (from hours to several days), depending on the conditions of exposure, whereas long-term<unk>  may begin in infancy with reaction to<unk> -based infant formula. Although most children outgrow<unk> , some may have the allergy persist into adulthood. IgE allergy Symptoms may include: rash, hives, itching of the mouth, lips, tongue, throat, eyes, skin, or other areas, swelling of lips, tongue, eyelids, or the whole face, difficulty swallowing, runny or congested nose, hoarse voice, wheezing, shortness of breath, diarrhea, abdominal pain, lightheadedness, fainting, nausea and vomiting. Symptoms of allergies vary from person to person and may vary from incident to incident. Serious danger regarding allergies can begin when the respiratory tract or blood circulation is affected. The former can be indicated by wheezing, a blocked airway and cyanosis, the latter by weak pulse, pale skin, and fainting. When such severe symptoms occur, the allergic reaction is called anaphylaxis. Anaphylaxis occurs when IgE antibodies are released into the systemic circulation in response to the allergen, affecting multiple organs with severe symptoms. Untreated, the anaphylactic response can proceed to a rapid heart beat, systemic vasodilation and a rapid decrease in blood pressure as conditions of anaphylactic shock, requiring emergency intervention to prevent a fatality (rare for<unk> . Non-IgE allergy Non-IgE mediated allergic reactions are slower to appear, and tend to manifest as gastrointestinal symptoms, without cutaneous or respiratory symptoms. Within non-IgE reactions, clinicians distinguish among: * food protein-induced enterocolitis syndrome (FPIES) * food protein-induced allergic proctocolitis (FPIAP) * food protein-induced enteropathy (FPE) The most common trigger-foods for these types of reaction are cow's milk and<unk> . FPIAP is considered to be at the milder end of the spectrum, and is characterized by intermittent bloody stools. FPE is identified by chronic diarrhea which resolves when the allergenic food is removed from the individual's diet. FPIES can be severe, even leading to anaphylaxis characterized by persistent vomiting 1–4 hours after an allergen-containing food, to the point of lethargy. Other symptoms may include headache and abdominal swelling (distension). Watery and sometimes bloody diarrhea can develop 5–10 hours after the triggering meal, to the point of dehydration and low blood pressure. Infants reacting to<unk>  formula may also react to cow's milk formula. International consensus guidelines have been established for the diagnosis and treatment of FPIES.
Soy allergy
Milk allergy
Peanut allergy
Corn allergy
Egg allergy
Poultry allergy
Fruit allergy
Sesame allergy