I have had a spot on the inside of my mouth for about 5 months. It has just spread to another spot about an inch away. I asked my primary doctor about this a few months ago, and my kidney cancer oncologist 2 months ago. Both said "I don't know, dentist, ear nose and throat? Both just thought it was an irritation, but since it has not gone away and spread, I really want to get it checked. But I don't know what kind of doctor to go to. I don't have dental insurance, but I do have medical insurance. So I thought I would ask the expert here. I know from my experience with my kidney cancer, I can get more info from the forum than the doctors.