What Is Chronic Idiopathic Urticaria (Hives)?
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What Is Chronic Idiopathic Urticaria (Hives)?
About 20% of people get hives -- itchy red or skin-colored welts also known as urticaria. They’re often caused by an allergic reaction to a food or drug. Usually, they go away quickly.
For a small number of people, though, hives come back again and again, with no known cause. When new outbreaks happen almost every day for 6 weeks or more, it’s called chronic idiopathic urticaria (CIU).
One percent or less of people have it. It’s most common in people between the ages of 20 and 40. With CIU, a single outbreak usually lasts no more than 24 hours. After that, new hives form.
https://www.webmd.com/skin-problems-and-treatments/chronic-hives-17/chronic-skin-rash
