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Food allergy

A food allergy is an abnormal immune response to food. The signs and symptoms may range from mild to severe. They may include itchiness, swelling of the tongue, vomiting, diarrhea, hives, trouble breathing, or low blood pressure. This typically occurs within minutes to several hours of exposure. When the symptoms are severe, it is known as anaphylaxis. Food intolerance and food poisoning are separate conditions.

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What to look for in someone if you suspect they have eaten something they are allergic to. Sometimes people develop allergies over the years, but many times an allergy can present after eating a new food, such as shellfish.

Contributed by Sammo Lea

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