Hi, Hives or skin rashes seem to be most probably due to an allergic reaction and it can be due to causes like an allergy to any food or medicine, skin cosmetics, detergents, leather, latex, any metals etc. I would suggest you consult an Allergist and get evaluated and a thorough clinical evaluation and investigations like allergic tests like Patch test, RAST test, food challenge test etc., can help in diagnosis and treatment can be done accordingly. The tests will help in ruling out the exact cause of the allergen and once you know the cause of the allergic reaction you can avoid exposure to it to prevent an allergy attack. The allergist can advise oral anti-allergic as well as injectable steroids for relief. Do cool compresses. Application of calamine lotion can help in soothing the skin. You can also be instilled an Immunotherapy that will help in reducing the severity and frequency of allergic attack. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Honey Arora, Dentist