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Hives are raised, often itchy, red welts on the surface of the skin. They are usually an allergic reaction to food or medicine.
Basic Info
Symptoms
Itching; Swelling of the surface of the skin into red- or skin-colored welts (called wheals) with clearly defined edges...
Causes
When you have an allergic reaction to a substance, histamine and other chemicals are released into your bloodstream, ca...
Tests
Your doctor can tell if you have hives by the appearance of your skin. If you have a history of an allergy, then the di...
Treatments
Treatment may not be needed if the hives are mild. They may disappear on their own. To reduce itching and swelling: Avo...
Complications
Anaphylaxis (airway is swollen, making breathing difficult; Life-threatening airway obstruction, if swelling occurs in ...
Prevention
Avoid exposure to substances that give you allergic reactions; Don't wear tight-fitting clothing and avoid hot baths or...
Doctor Specialties
Call 911 if you experience: Tightness in your throat; Shortness of breath; Tongue or face swelling; Fainting; Wheezing....
Basic Info
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