Unlike most rashes, hives: Hives can develop anywhere on the body, but most commonly appear on the chest, neck, arms, and legs. If you have hives Hives can have a few different causes, including ...

Hives are severe or cover a large area of your body. You believe your hives are caused by an allergy. Anaphylaxis is a medical emergency. If you or someone else is experiencing symptoms like ...

Drug rashes can be an unwanted side effect of many medications. Learn which medications can cause these skin reactions.

or a hives rash that affects more than one part of the body. Some infections that can cause hives are not contagious. For example, you may develop hives if you have a urinary tract infection (UTI ...