i've had a rash since december. it started under my arm and moved everywhere, except below my knees. i've seen 3 different doctors and have been treated for dry skin, scabies, allergic reaction to meds...nothing has helped. my last dermatologist did a biopsy and thinks it's internal, but can't figure it out. i have an appoinment in july to see a new specialist. i've been on steroids for a month. the rash has cleared up except for under my arms, breasts and one of my legs. i'm also on benadryll around the clock for relief. any suggestions?