Suggest Medication For Red Rash On Leg Causing Burning Sensation

Hi, may I answer your health queries right now ? Please type your query here...my left leg has a red rash running around from the front of the ankle to the back of my thigh. (I went to the clinic this morning and the doctor there said it was an allergic reaction) I bought benadryl - and it didn't help. The skin where the rash is feels sore and it feels like it is burning. The skin is also warm to the touch.