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 activity of the temporomandibular joint, and sometimes there is a possibility of subluxation. 2. This situation may be caused by a corresponding change in the muscles of the face, in the process of prolonged hyperventilation, a series of muscles around the bite muscle will produce a corresponding overfullness or atrophy with the facial activity, which will lead to a change in facial appearance. 3. The long-term emetic may lead to some abnormalities in the arrangement of the teeth, or the relative relationship, which may lead to changes in facial appearance.