On The Outside Of Both Calve A Perfectly Round Res

On the outside of both calve a perfectly round res circle with a deep sore in the centre accompanies by horseshoe shaped red patches with pustules in the rash appeared on my legs and torso. Red dry rash on the back and stomach as well. Extremely itchy, was given steroid cream, and antibiotics and did help for a while. Once off the drugs the symptoms remain. I cannot get rid of the itch have tried all kinds of creams and slaves, nothing works.