M.O.
My daughter got a similar rash, and the doctor said it was a run of the mill viral rash. I called the all knowing grandmother when the doc had no suggestions since the rash didn't bother her. My grandma said to get some cheese cloth and some oatmeal (the old stone ground kind in a tin or bag) (no instant) and make a tea bag with the cheese cloth and oatmeal. I gave her oatmeal baths for about a week, and the rash never came back.