<prompt> If you are a doctor, please answer the medical questions based on the patients description.A year ago I had a terrible rash on my arms, legs, stomach and back. I was treated for scabies twice and given prendisone. It took two months to get rid of the rash Biopsies were inconclusive. I work with small children and I am a diabetic. When the rash was at its worse my blood sugars were very high and I was put on insulin. The rash is raised and blistery. I am getting the rash back again and I am panicking. I dont think I can go through this again. Any suggestions?  <response>: Hello, Welcome to Chat Doctor. From your description, I would like to rule out a few possibilities like blistering disordersbulbous pemphigoid, bulbous lichen plans, insect bite reactions, Id eruptions and contact dermatitis. Scabies in adults in general do not blister. I would advise you to repeat a skin biopsy for histopathological examination and a special test called immunofluorescence. Please do the test before starting on prednisolone or other steroids as this can alter the biopsy picture. Hope this helps you. 