To treat itchy scalp, scalp with pimples, ringworms,acne. Run the shower water just as hot as you can stand it, you may have to duck in and out of it at first. I ran mine at 130%F for two or three minutes every day for five or six days. The itch stopped after the second day. I lived with this from 1963 till 2011 I went to more Doctors than I can remember Every one of them gave me a little white bottle of shampoo and a few other things, nothing helped.