Generally speaking, grinding teeth at night is considered as a sound, but it can be divided into grinding teeth and clenching teeth professionally and academically. The former has sound, while the latter has no sound. You don't have to grind your teeth very hard, but when you bite, all the muscles of your head, cheeks, neck and shoulders contract together, just like describing a person gnashing his teeth with anger. There are fewer people who grind their teeth than those who grind their teeth, and the percentage should be in single digits; However, biting may be a phenomenon that everyone has. People in China have long noticed this phenomenon, and they have created the idiom "bite the bullet", which seems to be absent in English. Every time the stock goes down, the headline of the newspaper is "bullet". Most people think that grinding teeth is shameful, but people who have no voice should not laugh with their voices. As far as muscle and joint injuries are concerned, silence is better than sound. Grinding teeth at night can lead to tooth wear, pain, sensitivity and inability to chew. Headache, neck and shoulder pain, jaw joint injury, but most people's motivation for seeking medical treatment is only to eliminate the sound. At present, the treatment mainly focuses on the so-called occlusal plate, commonly known as braces and dental plates. Occlusal plate intraoral device, usually made of transparent acrylic resin, can be worn on the teeth of maxilla or mandible instead of teeth to reduce sound. It can also reduce joint pressure. However, the bite plate itself can't stop the grinding action, which can be said to be a temporary solution rather than a permanent cure. The cause of night grinding is still unclear, and the nerve transmission and control are also unclear. Compared with Parkinson's disease, it can be said that it is ignorant, so it is still hopeless. Folk or Chinese medicine believes that there is ascaris in the anus, which may come from children grinding their teeth at night. It was also common for children to have ascaris before. But now children can't find ascaris in their anus, and grinding their teeth at night is still very common. It is confirmed by clinical language rescue that grinding teeth at night is related to high pressure. Therefore, paying attention to stress therapy, relaxing muscles and improving sleep should help to improve night grinding, but there is no evidence that sleeping pills have this effect. On the contrary, some tranquilizers that soothe the nerves and remove coke may make muscles move spontaneously without oil, from jaw shaking, similar to chewing to grinding teeth. Some antidepressants are used to suppress molars, but there are also reports that antidepressants can cause molars. At present, the popular secret recipe for wrinkle removal, toxoid, has also tried to inhibit molars. Many parents will ask: My child is only three years old, where does the pressure come from? It seems common for children under the age of six to grind their teeth, and the possible reasons can be explained from two aspects. One is that the nervous system of infants is not yet mature, and it is easy to wake up when sleeping; One is that the occlusal surface of deciduous teeth is like a washboard, which is very flat but carved, and it is easier to grind than permanent teeth. In addition to listening to the sound when grinding your teeth, you can also observe your teeth. You don't have to grind your teeth, because grinding your teeth starts from a little bit, so it is the correct judgment to observe whether the teeth have a shiny occlusal surface. Tooth enamel is very hard, only slightly lower than diamond, so its worn surface will shine like a diamond cut surface. In addition, the alveolar bone around the root will thicken into an annular bulge due to occlusion. Tooth marks on the edge of the tongue are biting phenomena. You can observe the edge of the tongue, whether there are continuous tooth marks, and whether the inside of the cheek is bald and white along the occlusal surface of the teeth. These two phenomena may be caused by the forced contraction of the tongue and cheeks and the squeezing with teeth when biting. Many people don't understand, thinking that it is tongue rot or teeth are too good or even cancer. In addition, observing the face shape is also one of the methods. Tight bite means that the masseter muscles will be developed, and the bones in the chin angle will become larger, forming a national character face. Some people turn to plastic surgery, but in theory it will inevitably recur. In short, there is no need to panic when grinding your teeth at night; Under the age of six, you don't need to see a doctor, and you may disappear automatically, and there is nothing you can do to see a doctor; No pain, discomfort or need for treatment. However, many perennial headaches and neck pains may come from grinding teeth, which can be improved through a complete course of treatment such as comprehensive occlusal plate, muscle relaxation, stress relief and lifestyle change. If the teeth are worn and sore, they can be directly protected by denture crowns.