Stress is one possible cause, but often the reason for the habit is not known. If something isn't done to stop the damage, bruxism may lead to jaw muscle or joint problems and even loss of your teeth. A mouth guard is a plastic device that fits over your teeth. It protects them from grinding damage. A mouth guard is worn at the times when you're most likely to grind your teeth.
Stress is suspected in many cases of bruxism.
Reducing stress may help relax your jaw muscles and make grinding less likely. Your dentist may suggest regular exercise or other ways to reduce stress. In some cases medication may be given. It may help relieve sore muscles or reduce stress.