2. Gum disease
Smoking abuses your gums two different ways. First, you are likely to produce more bacterial plaque in your mouth, which puts your gums under steady attack. Second, smokers have lower levels of oxygen in their blood, which slows healing. As a result, when your gums become infected, your body is less able to deal with it. Compared to non-smokers, gum disease progresses at a more rapid rate in people who smoke.