People with teeth grinding disorder are often accused by family members and classmates of disturbing their rest, which is a nuisance to others, and for themselves the abnormal grinding of their teeth can affect their dental health and lead to tooth sensitivity and TMJ disorders. Teeth grinding is associated with many factors, such as emotional stress, which is the most common factor in the development of teeth grinding. Fear, anger and various other tensions that are not relieved in time, these emotions are periodically expressed in the subconscious mind in various ways, and teeth grinding is one of the ways of expression. Local factors related to oral hygiene, eating before bed or dinner with vegetables or meat fibers left in the teeth, and do not brush your teeth before going to bed, the masticatory muscles are prone to contraction movement during sleep, causing tooth grinding. In addition, the teeth are not aligned properly, the upper and lower teeth correspond to the bite relationship is not normal, so the position of the chewing muscle is not normal or in a state of tension, after sleep, the chewing muscle occurs subconsciously contraction movement, resulting in tooth grinding at night. Systemic factors include gastrointestinal dysfunction related to parasites. Treatment of nocturnal teeth grinding is usually a combination of removing the cause and symptomatic treatment. Adjust the inappropriate occlusion, remove mental factors, especially anxiety, depression and other emotions, and maintain mental health. Those with intestinal parasitic disease can do deworming treatment, and those with tooth pain can do desensitization treatment. If necessary, a night molar jaw pad can be installed and worn on the arch of the lower teeth at night during sleep to stop the teeth grinding action. Of course, all these treatments need you to go to the hospital for specific examination and detailed diagnosis before they can be applied.