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- DictionaryHives/hīvz/
plural
- 1. a rash of round, red welts on the skin that itch intensely, sometimes with dangerous swelling, caused by an allergic reaction, typically to specific foods.
plural
Hives — also known as urticaria (ur-tih-KAR-e-uh) — is a skin reaction that causes itchy welts that range in size from small spots to large blotches. Hives can be triggered by many situations and substances, including certain foods and medications.
Angioedema can arise with hives or alone. It causes swelling in the deeper layers of skin, often around the face and lips. Short-lived (acute) hives and angioedema are common. Most times, they are harmless, clear up within in a day and don...
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The welts associated with hives can be:
Most hives appear quickly and go away within 24 hours. This is known as acute hives. Chronic hives can last for months ...
For most people who experience acute hives and angioedema, the exact cause can't be identified. The conditions are sometimes caused by:
If your symptoms are mild, you may not need treatment. Hives and angioedema often clear up on their own. But treatment can offer relief from intense itching, serious discomfort or symptoms that persist.
Treatments for hives and angioedema may include prescription drugs:
To lower your likelihood of experiencing hives or angioedema, take the following precautions:
For informational purposes only and not a substitute for professional medical advice, diagnosis, or treatment.
© Mayo Clinic
Chronic hives |
Stevens-Johnson syndrome |
Cold urticaria |