Hives, also known as urticaria, is a skin rash consisting of red, itchy welts that appear on the skin. The welts usually appear and disappear quickly, usually within an hour or two.

Hives can be caused by a number of things, from allergens such as pollens and foods, to environmental exposure to cold, heat, sunlight, or stress. They may also be caused by other medical conditions, such as thyroid disease, lupus, hepatitis, or mononucleosis.

Hives may appear anywhere on the body, and vary in size and shape. They may appear alone or in clusters. They may be raised or flat, and are typically surrounded by a red “halo.” Hives may be accompanied by itching, which may range from mild to severe.

Hives can often be managed at home using antihistamines such as Benadryl. It is also important to identify and remove any triggers that may be causing the hives. These may include a particular food or pollen that the person is allergic to, hot baths or showers, tight clothing, alcohol, or stress.

If hives do not go away after trying at-home treatments, it may be necessary to see a doctor. Doctors may run tests, such as a skin or blood test, to help identify any underlying conditions that may be causing the hives. They can also prescribe medications to help reduce the itching, inflammation, and swelling associated with hives.

Hives are usually a harmless condition, but in some cases, they can be a sign of a more serious condition. It is important to talk with a doctor if hives last longer than three days or cause severe itching, swelling, or difficulty breathing.

Overall, hives can be an annoying and uncomfortable skin condition. But by understanding what may be causing hives, and by treating them appropriately, they can be easier to manage.