Adults sleep grinding teeth may be related to mental tension, oral dental malocclusion, neurological disorders, the specific need to go to the hospital to confirm the examination. 1. Mental tension. When mental tension, long-term anxiety and stay up late or depression and other psychological state is not good, will be under the influence of mental factors at night grinding teeth. 2. Oral malocclusion. Long-term missing teeth, misalignment of teeth, resulting in temporomandibular joint disorders can cause night grinding. 3. Neurological disorders. Central nervous system disorders at night sleep brain abnormal excitation, causing masticatory muscle excitation, can also appear up and down teeth grinding, can be seen in epilepsy, schizophrenia and other diseases. Adults sleep grinding teeth may also be caused by causes, specific need to go to the hospital to check the whole body and oral condition to determine.