When your skin is red, itchy, and irritated, it could be a rash or it might be hives. We spoke with experts to learn how to ...

Learn when rashes signal medical emergencies. Color, location, and symptoms reveal dangerous conditions needing urgent care.

The symptoms of drug-induced skin reactions can range from a mild itchy rash to more serious reactions, such as widespread blistering or anaphylaxis. Skin reactions may appear right away after ...

Hives are usually caused by an allergic reaction where the immune system releases histamine in response to a trigger. "Common triggers include certain foods such as shellfish, nuts, and eggs ...

Discover the causes, symptoms, and treatment of food allergies, and learn how to manage them safely with expert tips on ...

Skin reactions can be alarming, especially when they appear suddenly. Many people struggle to tell the difference between hives and a rash, but knowing the cause is the first step toward relief.

Solar urticaria is a rare allergic reaction to sun exposure. The condition causes an itchy rash or hives that appear on any skin that has been exposed to the sun. The more skin that is exposed to ...

However, many other conditions may cause a similar rash, including ringworm, fixed drug reactions, and allergic reactions to insect bites. Lyme disease is a bacterial infection that can spread to ...

It looks almost exactly like regular hives but does not increase a person’s risk for anaphylaxis (i.e., a severe allergic reaction that causes difficulty breathing and swelling of the throat ...