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Hives (urticaria) - close-up

Hives develop when histamine is released into the small blood vessels (capillaries. The capillaries dilate which causes a welt, and fluid oozes into the surrounding tissue, causing swelling. Histamine also causes intense itching.

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Definition Alternative Names Causes, incidence, and risk factors Symptoms Signs and tests Treatment Expectations (prognosis) Complications Calling your health care provider Prevention References

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Centers

·As a Disease/Condition

Hives

·As a Complication

Food Allergy

·As a Symptom

Acute Stress Disorder

Infectious Mononucleosis

Systemic Lupus Erythematosus

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