The old expression of grinding your teeth because you are angry isn’t that far off. If you suffer from Bruxism (Teeth Grinding) can be caused by stress, sleep apnea, and yes pent up anger. One way to help improve your sleep and minimize the damage done to your teeth is to exercise regularly to release stress and anger. Even meditation has shown some improvement for people.
For more info on sleep, sleep tips, and other health issues check out: