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URL of this page: https://medlineplus.gov/hives.html

Hives

Also called: Urticaria

Summary

Hives are red and sometimes itchy bumps on your skin. An allergic reaction to a drug or food usually causes them. Allergic reactions cause your body to release chemicals that can make your skin swell up in hives. People who have other allergies are more likely to get hives than other people. Other causes include infections and stress.

Hives are very common. They usually go away on their own, but if you have a serious case, you might need medicine or a shot. In rare cases, hives can cause a dangerous swelling in your airways, making it hard to breathe - which is a medical emergency.

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The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health.