Chronic skin rash, multiple biopsies, the latest read that it appeared to be a medicine induced rash, however I do not take anything. Inflammation of the blood vessels, no known cause.(2 rounds of prednisone, no change...antihistamines, do not alter the state either. They also told me that it appeared to be photosensitive, however, my legs never see the light of day so how can this be? The rash never changes always burns, no itching and all bloodwork and I mean thousands of dollars worth of bloodwork is normal. Have seen an allergist and not allergic to anything.