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Hives and Angioedema

Hives and Angioedema Overview

Hives is an allergic skin reaction that comes on suddenly. The hives themselves are slightly raised, smooth, flat-topped bumps called wheals (look like mosquito bites) and welts that are usually more red in color than the surrounding skin and cause severe itching.

Angioedema is like hives, only the welts are larger and form at a deeper layer in the skin. This causes severe swelling, usually in the face, near the eyes and mouth. The swelling can also occur in the inside of the throat, which is a dangerous situation because it can close off the passage of air into the lungs.

Hives and angioedema can occur together, but they usually do not. Hives is the most common rash for which people seek emergency medical care. One of every 5 people will have hives at some time in their lives. Angioedema is less common. Hives and angioedema can happen at any age.

Medical professionals refer to hives as urticaria.

This article does not refer to an uncommon and more serious condition, hereditary angioedema. Hereditary angioedema involves swelling over the entire body, including some internal organs.



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Hives and Angioedema

Eczema »

Eczema Overview

Eczema is an allergic condition that affects the skin. Another name for eczema is dermatitis. Dermatitis is inflammation of the skin. There are several different types of dermatitis, but the one people usually mean when they say eczema is atopic dermatitis. Atopic refers to a lifelong tendency to allergic conditions such as asthma and allergic rhinitis (hay fever).

Eczema can be triggered by just about anything coming in contact with the skin. It occurs in atopic people, who are extra sensitive to skin irritation. Dry, flaky skin appears over red, inflamed areas, causing intense itching and burning.

Eczema is a very common condition, and it affects all races and ages, including young infants. About 1-2 percent of adults have eczema, and as many as 20 percent of children are affected. It usually begins early in life, even before asthma or hay fever. Most affected individuals have their first episode before age 5 years.

For some, the dise...

Read the Eczema article »



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Angioedema »

Angioedema is a subcutaneous extension of urticaria, resulting in deep swelling within subcutaneous sites.

Read More on eMedicine »

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