Teeth grinding is generally considered to be related to a variety of factors such as mental factors, neurological factors, occlusal factors, heredity, local irritants, and other physical illnesses. 1. Mental factors: mental tension, anxiety, frustration and other emotions may cause teeth grinding. 2. Neurological factors: teeth grinding may be related to central nervous system dysfunction. Epilepsy, Parkinson’s disease, schizophrenia, etc. may cause teeth grinding. 3. Occlusal factors: an uncoordinated occlusion can cause excessive attention to the nerves of a sensitive person, which can lead to teeth grinding. 4. Genetic factors: teeth grinding disorder has a certain family genetic tendency. 5. Local irritation factors: such as periodontitis, is one of the important reasons for the occurrence of teeth grinding. 6. Other physical disease factors: such as blood pressure, blood sugar, blood calcium concentration changes, as well as gastrointestinal dysfunction, intestinal parasitic infections, etc., can cause teeth grinding. Teeth grinding is particularly strong should be timely medical treatment, under the guidance of the doctor for treatment.