In the last month, they've spread to cover my entire chest
, upper arms(down to short sleeve length), and
pretty solidly. This past week, its spread to my lower back and upper butt, and the top of my stomach. I went to a dermatologist, and he diagnosed me with prurigo, gave me a prescription for some cream and told me to use sarna. Didn't explain what it was, nothing, so I looked it up when I got home - I do not believe that is what I have.