Hello,
Welcome to the ehealthforum and I am really glad to help you out.
Topical and oral steroids are needed if peeling occurs in pityriasis rosea and you should go ahead with your doctor's advice. Water, sweat, and soap may cause irritation and should be avoided. Use mild soaps and wear cotton clothes.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.