Can hives be prevented or just treated?

PREVENTING HIVES: Hives -- urticaria -- is a common disorder. It's a symptom of some allergy going on in the body. Hives appear on the skin in the form of itching, stinging, & burning wheals (welts), like big mosquito bites. Common causes are medications like Aspirin & penicillin. Some foods can also responsible. To prevent hives stop whatever you think .You had taken or done just before the hives started.