Are there any good lotions for dry skin?

Even though it is summer, I have developed something like ringworm, and I scratch it until it bleeds because it is so itchy. I even scratch it while sleeping... I also press hard with my fingernails, and it leaves scars. I am worried because it is unsightly.

I've tried using gentle cosmetics and even applied medication prescribed by the doctor, but it's not getting better. Do you happen to have any skincare recommendations?