rash on hands, wrist and forearm leading to discoloration, severe itching and slight swelling preceded by small watery bumps. not sure if allergy or rash. spread from hands upward. Mostly occurs after eating sugar. what can relieve itching cortizon creams do not work, blue star ointment does not work, calamyne lotion does not work, witch hazel doest not work. what would you suggest?