Teeth grinding is the sound made by the upper teeth rubbing and colliding with the lower teeth. 1. The clinical manifestations of patients with teeth grinding vary, usually manifested as night sleep teeth grinding or daytime involuntary teeth grinding, teeth clenching and grinding sound. 2. Teeth grinding refers to people in the non-physiological state of masticatory muscles produce involuntary contraction, so that the upper and lower teeth produce teeth clenching or grinding, and then interrupt the normal physiological rest of the jaw position of the phenomenon of non-physiological dental contact. 3. The etiologic mechanism of teeth grinding is still inconclusive, and it is currently believed that it may be caused by multiple factors such as neurological factors, occlusal factors, psychiatric factors, endocrine disorders of the stomatognathic system, neuromuscular dysfunctions, and heredity, and so on. It is recommended that when the symptoms of teeth grinding are severe, the patient can go to the hospital for consultation, to clarify the cause of the disease, and under the guidance of the doctor to carry out psychological and behavioral therapy, muscle relaxation therapy, occlusion therapy, drug therapy (such as diazepam, ghrelin, vitamin B1), etc., and the use of medication should be in accordance with the doctor’s instructions.