Grinding teeth at night is clinically known as bruxism. Long-term, severe bruxism may lead to periodontal tissue damage, tooth sensitivity, fracture, wear, and even facial muscle and nerve spasm or temporomandibular joint disorder syndrome. Teeth grinding disorder may be related to the following physiological and pathological factors: I. Physiological factors: such as high stress in life or work, overwork, frightened, or long-term mental tension, psychological inability to relax, excessive worry and anxiety before going to sleep, etc., can lead to patients with teeth grinding symptoms. These symptoms are usually episodic, and can disappear after the removal of tension, relaxation and sufficient sleep. In addition, teeth grinding disorder may be related to genetic factors, if parents have teeth grinding disorder, the chances that the child has teeth grinding disorder is very large, often related to poor occlusal relationship. Second, the pathological factors: 1, oral diseases: such as uneven teeth, overgrown or missing teeth, bite abnormalities, periodontitis, etc. will lead to the normal closure of the mouth, teeth discomfort during sleep, there will be unconscious grinding behavior; 2, mental illness: such as the existence of psychomotor epilepsy, Parkinson’s, schizophrenia and other psychiatric diseases, may also lead to involuntary twitching and spasms during sleep. Can be localized as grinding teeth, facial muscle tightness; 3, digestive tract diseases: some doctors believe that improper diet triggers intestinal dysfunction, stimulating the brain nerve, so that the chewing muscle continues to contract, resulting in teeth grinding, or do not pay attention to dietary hygiene habits, resulting in parasitic infection of the gastrointestinal tract, due to parasitic stimulation of intestinal peristalsis accelerated, abdominal discomfort, and thus night sleep due to neural excitement will also appear grinding teeth Symptoms. In addition, anemia, malnutrition, endocrine disorders and other factors may also cause grinding teeth at night, patients can go to the hospital for formal examination to clarify the type of disease, in order to actively target treatment. In life, you should develop good eating and living habits, avoid overeating, pay attention to personal hygiene and maintain a good oral environment. If problems such as misaligned teeth bite and abnormal growth are found, timely orthodontic treatment should be carried out to reduce the occurrence of teeth grinding at night.