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Definition: Hives are raised, itchy red or pink welts on the surface of the skin. Superficially, they may resemble insect bites, but they often occur over a large area. Hives may appear due to the release of histamine as part of an allergic reaction to a variety of substances, both food and non-food. A related condition, angioedema, causes swelling of the blood vessels under the skin and may result in pain and redness. Also Known As: urticaria Updated: May 3, 2008 Hives and Other Allergy SymptomsHives and Food AllergiesEczema and Food AllergiesCommon Food Allergy Symptoms More Food Allergy BasicsFood Allergy Risk Factors10 Food Allergy Facts and MythsCooking for Food Allergies 101 More Food Allergy Terms to KnowRelated ArticlesHivesHivesHivesHivesHair Color -- Finding the Right Shade of Red |
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