Someone in the night sleep often gurgling sound of clenching teeth, the morning up to ask him but do not know, the medical grinding of teeth called the night grinding disease. Night grinding teeth is a phenomenon, he is not a disease, as in dreaming and talking in sleep. Excessive emotional tension or excitement, bad biting habits, intestinal parasitic infections, etc., tend to increase the number of night grinding teeth. Severe night grinding will speed up the wear and tear of teeth appearing symptoms of tooth hypersensitivity, and even cause periodontal tissue damage, chewing muscle fatigue and temporomandibular joint dysfunction. The prevention and treatment of night grinding should start from the etiology, in order to receive good results. 1, eliminate tension to lift unnecessary worries, open-minded, reasonable arrangements, if necessary, oral Valium tablets, 1-2 times a day, each time a tablet. 2, to develop good habits of life regular living, dinner should not be too full, no strenuous exercise before bedtime, especially children should develop the habit of hygiene. 3, suspected of intestinal parasites under the guidance of physicians for deworming treatment to reduce intestinal parasites peristalsis stimulation intestinal wall. 4.Correct bad habits of dental and jaw system such as unilateral chewing, pencil biting, wrong etc. 5, the above treatment still does not see improvement should go to the dental hospital to make a dental pad, wear it on the teeth at night before going to bed and remove it in the morning. The pad can eliminate interference and relieve muscle tension. After nightfall, most people have been sound asleep. However, there are some people (especially children and teenagers) who will grind their teeth when they are asleep. As no food in the mouth when grinding teeth at night, the amount of saliva secretion is correspondingly reduced, the teeth are not lubricated, so that the formation of the “dry grinding” like pushing empty mill. If often “dry grinding”, the wear and tear on the teeth is quite serious. Over time, the worn teeth will be different degrees of soreness or pain, and sometimes also form the jaw joint disorder.