I had the same thing for almost 3 years. Went to many Doctors, and like you said, they don't know how to treat it. I went to hell for three and half years. I am a Skin Care Specialist (Aesthetics), and after two years going to see many diferent doctors, and after lots of research I created a cream that make then go away. If you want to call me, I can tell what to do to get ride of this terrible thing.