Long-term repeated emetics may indeed lead to changes in facial appearance for several reasons: 1. Long-term repeated emetics may lead to lesions of the temporomandibular joint. Because in the process of emetic, it is necessary to keep a wide range of mouth open and maintain this state continuously. This will lead to excessive movement of the temporomandibular joint, and sometimes there is a possibility of subluxation. In the process of prolonged hyperventilation, a series of muscles around the bite muscle will be overfilled or atrophied with the facial activity, leading to changes in facial appearance. 3, this situation may also be caused by the abnormal arrangement of teeth, long-term emetic may lead to some teeth arrangement, or the relative relationship between the abnormal, which leads to changes in facial appearance.