question: I have just turned 50 ..8 days ago. I noticed when brushing my teeth a black spot about the size of a normal button. Maybe a bit smaller. It is black in color and there is no swelllling or pain. Just appeared just like that. I do not drink or smoke and workout daily. Try to maintain a healthy diet . However i have this annoying cough lately. I am scheduled to see my dentist on the 28th aug. I am very nervous about this spot which is located right near my back molar on the roof of my moth. Very dark in color...black even. Please tell me this is not cancerous.