I have atopyic dermatitis my body itches and is very dry, my scalp burns , itches, and it is very flaky. This was prescribed for my skin problem. Can I use it on my scalp? I was told to mix 1/2 tube with Ceravle cream. One day use mixture all over body except face, and the next day to use only the Cervale on body and face. Two week regimene.