I have the same skin problem. But I have it on my chest, back, stomach, shoulders, and arms. It is called Tinea Versicolor. It is a type of a fungus and I believe it is triggered by heat. During the summer it flairs up alot and if I do not take care of it is runs onto my face. The Selsun shampoo that is PRESCRIBED for it WORKS. But you have to follow directions EXACTLY the way the doctor or bottle tells you. The store shampoo does not work as well.