Hives and angioedema

ARTICLE SECTIONS

Introduction Signs and symptoms Causes Risk factors When to seek medical advice

Screening and diagnosis Complications Treatment Prevention Self-care

Introduction

Hives — also known as urticaria — are raised, red, itchy welts (wheals) of various sizes that appear and disappear on your skin. Angioedema, a similar swelling, causes large welts deeper in your skin, especially near your eyes and lips. A more serious condition — hereditary angioedema (HAE) — is an uncommon, inherited disorder, which can cause sudden, severe and rapid swelling of your face, arms, legs, hands, feet, genitalia, digestive tract and airway.

As many as one in five people experiences acute hives or angioedema at one time or another. HAE, on the other hand is rare.

In most cases, hives and angioedema are harmless and don't leave any lasting marks, even without treatment. The most common treatment for hives and angioedema is antihistamine medications. Serious angioedema can be life-threatening if swelling causes your throat or tongue to block your airway and leads to loss of consciousness.

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Signs and symptoms