A once-rare disease that causes a person to develop a severe allergy to red meat is seeing an “explosive rise” across America ...

Ingredients in some vitamin supplements may cause hives or a skin rash. Treatments include antihistamines and topical corticosteroids.

If over-the-counter antihistamines aren’t effective for you, your doctor may recommend H2 blockers, steroids, biologics, or ...

Discover how exercise-induced urticaria can turn your workout into a challenge, affecting those who love to run.

COVID arm rash is a reaction to the COVID-19 vaccine, usually occurring about a week after the Moderna shot. The rash causes redness, itching, and swelling around the injection site but usually ...