The formation of side eating habits, the main reason is caused by their own, some people have a side of the teeth have all kinds of pain, such as caries, pulpitis, apical inflammation, gingivitis, periodontitis, tooth fracture, cryptic cracks, etc. caused by pain, and afraid to go to the hospital to see a doctor, long-term effective treatment is not available. Due to their own fear of incurring pain in the affected tooth by eating, they have to bite things with the other side. Another reason is that one side of the teeth is missing more, long-term did not go to the veneer, restoration, chewing ability and low efficiency, have to use the other side of the teeth to eat. In addition, if the periodontal condition of some teeth is very poor, the loosening is obvious, there is no power when biting, or there are more cavities, eating often stuffed teeth, will gradually give up using this side of the teeth, and slowly develop the habit of eating with the other side of the teeth. If children often eat on one side, it will affect the growth and development of the bones and muscles of the face, and over time, the two sides of the face will not be the same size, and it will look like it is crooked to one side, which will seriously affect the appearance of the face. This is mainly due to the frequent use of one side of the teeth to eat, this side of the chewing movement is frequent, jawbone and facial muscles are overdeveloped, while the other side of the development of insufficient. If the face is so developed that it is already shaped crookedly, it is very difficult to correct it. The habit of eating on one side of the face can also directly affect the child’s temporomandibular joint developmental deformities, which can lead to temporomandibular joint disease, joint pain, popping and ringing, and difficulty in opening the mouth over time. In addition, eating on the side may cause malformation of the teeth bite relationship, one side of the teeth “Baotian”, that is, anti-mandibular. Adults who eat on one side for a long time will cause temporomandibular joint disease, joint pain and popping when opening and closing the mouth, which will bring a lot of inconvenience to life and work. It is also very easy to develop dental caries, gingivitis, periodontal disease, and the shrinkage of periodontal tissues appears earlier and develops more rapidly than those who eat bilaterally. To correct lateralized eating, the first step is to supervise the child to develop the normal habit of chewing bilaterally. Adults should also be treated for various dental diseases, and missing teeth should be set with dentures as soon as possible to ensure the function and efficiency of chewing and eating.