Hives or urticaria is an allergic condition which causes red and sometimes itchy bumps on
your skin. Hives can occur anywhere on
the body such as the trunk, arms, and legs.
They are usually allergic (food, medication and insect stings) but may also be due to infections and stress. Many a times no specific cause for them is ever found.
You may try some OTC antihistaminics (such as cetirizine, loratidine, benadryl). You may try calamine lotion locally which has a soothing effect.