Hives are raised, often itchy, red welts on the surface of the skin. They are usually an allergic reaction to food or medicine.
Urticaria
When you have an allergic reaction to a substance, your body releases histamine and other chemicals into your bloodstream. This causes itching, swelling, and other symptoms. Hives are a common reaction, especially in people with other allergies such as hay fever.
When swelling or welts occur around...
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Source: HealthCentral Encyclopedia
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Source: ADAM Encyclopedia
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UrticariaSymptomsItchingSwelling of the surface of the skin into red- or skin-colored welts (called wheals) with clearly defined edgesThe hives may... Read more »
Source: ADAM Encyclopedia
UrticariaPreventionAvoid exposure to substances that give you allergic reactions. Don't wear tight-fitting clothing and avoid hot baths or showers... Read more »