Suggest Treatment For Redness On Arms And Legs Along With Itching

Started with a skin rash that was incredibly itchy, small pustules and doctors thought it was a contact dermatitis of some kind like poison oak or poison ivy--weepy skin, etc.--took a round of prednisone and it didn't do much, itchiness continuing, and now at the 6 week mark redness of arms, abdominal region, inner thighs, legs with edema--skin goes from red to white upon touch; Claritin brings temporary relief of itching, in early 60s, 5'8", 170 lbs