Night grinding generally refers to nocturnal grinding, which is a type of bruxism and is an unconscious, non-physiological jaw movement during sleep caused by oral parafunction. The specific etiology of night grinding is not yet clear, but it may be related to the following factors: 1, occlusal factors: including malocclusion, missing teeth, dental caries, dental malocclusion, unilateral chewing and other factors causing occlusal incoordination, often considered the main factor; 2, neurological factors: some studies have indicated that teeth grinding disorder may be related to abnormal nervous system function, sleep disorders and other factors; 3, psychological factors: prolonged stress, Excessive tension, anxiety, depression and other emotions can affect the normal sleep at night, resulting in part of the cerebral cortex continues to be active, so that the chewing muscle contraction leads to night grinding; 4, other factors: including parasitic infection, vitamin D deficiency rickets, gastrointestinal disorders, hyperthyroidism, genetics, etc. can cause night grinding. Patients who grind their teeth at night for a long period of time are recommended to visit a hospital in a timely manner, and under the guidance of a doctor, reduce the symptoms of night grinding through the following common treatment means: 1, accommodation treatment: by balancing the relationship between the teeth, occlusal muscles, temporomandibular joints and other parts of the body to relieve the symptoms of night grinding, for obvious dental malformations, orthodontic, orthognathic and other treatments are required; 2, wearing an occlusal plate: occlusal plate is currently a more common and effective It helps to relieve muscle tension and reduce tooth wear, and can be taken off by itself during the day, which is more convenient, but cannot cure night grinding; 3, medication: common intra-masticatory muscle injection of botulinum toxin treatment, as well as the use of dopamine, glutamine and other medication, but may cause adverse reactions such as swallowing difficulties, mouth opening difficulties, etc., so generally need to be used after expert consultation; 4, correction of Bad habits: such as unilateral chewing, betel nut chewing, chewing gum, pencil biting and other bad habits, insist on carefully brushing teeth in the morning and evening, rinsing mouth after meals to reduce bacterial growth in the mouth; 5. Other treatments: including psychotherapy, biofeedback treatment, mandibular advancement type orthodontic treatment and other ways, as well as active treatment of gastrointestinal parasites, vitamin D deficiency, dental caries, gingivitis, periapical inflammation and other diseases.