Hives
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Hives (urticaria) are a common skin problem that affects up to 25% of people at some point in their lives. Hives are characterized by inflamed itchy, red raised marks on the skin.

Chronic hives caused by histamine release
Chronic hives form red wheals that can be extremely itchy, but generally last less than 24 hours. Chronic hives occur 2x/week or more.

Hives causing patchy wheal symptoms
Hives are characterized by temporary (less than 24 hours) raised, red patches known as wheals.

