question: I have white spots on my upper gums and they hurt alot. I've had a couple within the past month and at first I thoght it was a canker sore so I didn't mind it. But now that they keep comming back I feel like it might be due to the fact that I am a regular smoker? I do brush my teeth twice a day so I'm sure thats not a problem. If you could assist me that would be great