There are generally three conditions for grinding teeth when sleeping at night: 1, and mental stress is high. If you are stressed by the pressure of study and work during the day, you will be nervous. When sleeping at night, the spirit is still in a state of tension, the muscle tension of masticatory muscles is still high, and involuntary molars will appear; 2. Bad occlusion. During the examination, it will be found that individual teeth or multiple teeth are not aligned correctly. When you sleep, your teeth will unconsciously grind their teeth and protrude. ...