Eating always bite cheeks, there are mainly the following reasons: First, the teeth are not aligned, when biting cover, over jaw problems, it is easy to cause the phenomenon of biting cheeks and biting tongue, usually, need to orthodontic teeth, in order to be able to align the teeth, adjust the normal over jaw, cover, will not be biting cheeks or cheeks. Second, due to the phenomenon of missing teeth or missing teeth, the jaw and face, that is, the location of the cheek, the intra-oral mucosa may thicken, when chewing may always bite, so it is recommended that when there are missing teeth, timely repair. Third, due to the problem of active denture in the elderly, the phenomenon of biting the buccal mucosa will occur because the restoration is not suitable or there is a problem with the occlusion made by the restoration. Fourth, the facial meat is thicker and the buccal fat pad is higher, so the phenomenon of biting the cheek will appear, but this phenomenon is relatively rare and usually does not occur.