This is the best thing you can do for your mouth, and the rest of your body, too. The more and longer you smoke -- cigarettes, cigars, or pipes -- the higher your risk. But even if you’ve been at it for a long time, stopping now helps. If you do get cancer, quitting means your treatment will work better, you’ll heal faster, and it’ll be less likely to come back. And if you don’t smoke, don’t start.