Overview
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’t leave any lasting marks, even without treatment. Hives that last longer than six weeks are called chronic hives.
Hives and angioedema are usually treated with antihistamine medication. Angioedema can be life-threatening if swelling of the tongue or in the throat blocks the airway.
Symptoms
When to see a doctor
Complications
- High blood pressure.
- Diabetes.
- Heart failure.
- Some types of heart valve disease.
Prevention
- Control high blood pressure, high cholesterol and diabetes.
- Don't smoke or use tobacco.
- Eat a diet that's low in salt and saturated fat.
- Exercise at least 30 minutes a day on most days of the week unless your health care team says not to.
- Get good sleep. Adults should aim for 7 to 9 hours daily.
- Maintain a healthy weight.
- Reduce and manage stress.
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