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

EpiPen is a first-line, emergency treatment for severe allergic reactions. Benadryl is used for milder allergic reactions. The decision of when to use one or the other depends on the specific symptoms ...

Stress triggers histamine release, which can cause itching, redness, and hives in some people. Can over-the-counter (OTC) antihistamines provide relief? Histamine is a key chemical involved in ...

Experts recommend introducing peanuts to infants to prevent allergies, with a new study showing a 43 percent lower ...