A common cause of children grinding teeth: 1, intestinal parasitic disease, especially intestinal ascariasis, quite common in children; 2, diseases of the gastrointestinal tract, oral diseases; 3, before bedtime to children to eat indigestible food, so that after the baby sleep are likely to stimulate the corresponding parts of the brain, through the nerve caused by continuous contraction of the chewing muscle; 4, neurological diseases, such as psychomotor epilepsy, hysteria, etc.; 5, pediatric 6, lack of vitamins, children suffering from vitamin D deficiency rickets, due to the disorder of calcium and phosphorus metabolism in the body, will cause bone decalcification, muscle pain and plant nerve disorders, often appearing excessive sweating, night terrors, irritability and night grinding; 7, teeth misalignment, chewing muscle force too much or long-term chewing with one side of the teeth, as well as teeth Bite relationship is not good, the occurrence of temporomandibular joint dysfunction, will also cause night grinding; 8, in addition, the child 8 – 11 years old during the replacement of teeth, because the gums are itchy, it is easy to produce a slight grinding phenomenon, this period of mild grinding is a normal phenomenon, if more serious will need treatment, after this stage, usually disappear on their own; 9, the child’s emotions and the impact of life patterns, learning is more nervous, stressful, night watching thrillers. Stress, watching thrilling fighting TV at night, playing excessively before going to sleep, these factors can cause teeth grinding; it can be seen that teeth grinding is basically caused by some kind of disease, some children due to grinding teeth for a long time, although the corresponding treatment, but because the cerebral cortex has formed a solid conditioned reflex, so the night grinding action will not disappear immediately, easy to form a habitual grinding, especially gastrointestinal disease although there is improvement But gastrointestinal dysfunction still exists, so the teeth grinding action can not be corrected in a short time, must adhere to a longer period of treatment to get better. Second, how to prevent: 1, try to relax children’s mood before bed, especially before going to sleep. Can be appropriate to tell warm and soothing stories; 2, avoid excitatory food, improve the sleep environment; 3, try to avoid drinks or food containing caffeine. Avoid coffee, chocolate, cola, etc.; 4, eat more vitamin-rich food; 5, hot compresses on the upper and lower jaw, can relax the occlusal muscles, can also reduce the chance of headaches; 6, maintain the correct posture. Hunching over can also lead to teeth grinding; 7. Be sure to brush your teeth before going to bed, and do not overfill your dinner; 8. Pay attention to calcium supplementation in your daily diet and regular deworming; 9. Keep your mouth in a healthy resting state during the day, i.e., keep your teeth loose. Third, how to treat Severe night teeth grinding patients should take active treatment measures, first from the cause, pay attention to adjust the psychological, reduce stress. It is best to rest and relax before going to bed, avoid excitatory foods, and improve the sleep environment. Systemic diseases should also be actively treated to reduce the occurrence of night grinding. For teeth grinding with dental factors as the main cause, it is necessary to go to the hospital dentistry department for treatment, by grinding the tooth early contact point to remove the dental interference. Patients with missing teeth do denture restoration, change unilateral chewing habits and other measures to achieve occlusal balance. If the teeth are badly worn, it is recommended to use dental pads for spacing to avoid further tooth wear. Patients cannot buy them on their own and need to choose and wear them under the guidance of a doctor.