Pictures of hives, also known as urticaria, can help you to identify these raised, red, itchy bumps or welts. Causes include stress, infections, food or latex allergies, medications, and ...

An allergic reaction may cause a rash on a baby’s skin. An allergic rash, or hives, is often red or discolored raised bumps on the skin. The reaction may occur due to foods, stings, bites ...