Grinding teeth at night in bed is a more common symptom, regardless of gender, men and women may appear. At present, the etiology and mechanism of grinding teeth in bed is not clear, and the following reasons may cause patients to have teeth grinding symptoms: 1, abnormal mental state: when patients are too nervous, excessive psychological pressure, anxiety, depression and other abnormal emotions, the trigeminal nerve may be continuously excited at night, causing patients to have symptoms of grinding teeth in bed; 2, oral and maxillofacial diseases: malocclusion, tooth 2, oral and maxillofacial diseases: malocclusion, misalignment of teeth, missing teeth and other dental diseases, or prolonged use of one side of the teeth to chew food, resulting in muscle atrophy on the other side of the face, may also cause patients to grind their teeth in bed; 3, gastrointestinal disorders: due to the movement or secretion dysfunction of the stomach and intestines, may cause patients to appear acid reflux, clinical manifestations of gastric distension, belching, anorexia, nausea, vomiting, burning sensation under the raphe, after eating Symptoms such as fullness and even abdominal pain, some patients may also be accompanied by symptoms of grinding teeth while sleeping; 4, parasitic infections: if patients have parasitic infections such as roundworms and pinworms, they may also have symptoms of grinding teeth while sleeping. In addition, some patients with teeth grinding in bed may be due to family genetics, lack of trace elements in the body and other reasons, it is recommended that patients with more serious grinding symptoms should be treated early to avoid causing oral and maxillofacial diseases.