Someone makes a creaking and grinding sound in his sleep at night, and when he gets up in the morning and asks him about it he doesn’t know. Medically, it is called teeth grinding or night grinding. The main causes of night grinding teeth are: excessive emotional tension, excitement, fatigue, and mental factors such as being frightened, so that the excitation or inhibition process of the cerebral cortex is out of order, resulting in night grinding teeth. Due to eating too much, accumulation of food, indigestion, absorption of toxins secreted by bacteria in the gastrointestinal tract stimulate the cerebral cortex, so that the excitation and inhibition of the cerebral cortex out of balance, resulting in night grinding teeth. More people, especially children, cause night grinding is intestinal parasites, the activity of intestinal parasites and the secretion of toxins, stimulating the cerebral cortex to occur in the chewing muscle spasm contraction and cause night grinding teeth. Severe night grinding is the upper and lower teeth dry grinding, will accelerate the wear and tear of teeth, causing periodontal tissue damage, chewing muscle fatigue and temporomandibular joint dysfunction, so should be actively prevented and treated, should do the following: 1, eliminate tension, lift unnecessary concerns, open-minded, reasonable arrangements for work. If necessary, take a small amount of Valium drugs under the guidance of a doctor. 2, develop good habits, regular living, do not eat too much dinner, and do not do strenuous exercise before going to bed. 3, treatment of intestinal parasites, reduce intestinal parasites peristalsis on the intestinal wall stimulation reflexive cause night grinding teeth. 4, wear dental jaw pad. The above treatment still does not improve, you should go to the dentist to make a night molar orthodontic appliance, also known as dental jaw pad or dental pad, worn on the teeth at night and removed in the morning. The pad isolates the upper and lower teeth from direct contact, reducing tooth wear and periodontal damage and relieving muscle fatigue. It also alters the signals transmitted from the periodontal ligament to the central nervous system, so that nocturnal grinding activity can be suppressed. Practice has shown that the number and duration of night grinding is significantly reduced after wearing dental pads.