Experts in Qingdao Nord Hospital found that mandibular hypertrophy is a part of the swelling and protrusion of the cheeks under the ears. Seen from the front, the contours on both sides of the face are vertically downward and intersect with the lower contour at almost an angle, making the lower third of the face look wide and wide. The causes of mandibular hypertrophy are as follows: 1. Anatomically speaking, mandibular hypertrophy is mainly caused by the overgrowth of bone or the overgrowth and protrusion of masseter muscle in mandibular angle (a part of mandibular angle). 2. From the clinical experience, the hypertrophy of mandibular angle is generally related to eating too much snacks and chewing gum (or betel nut) during the physical development of teenagers; It may also be caused by grinding teeth at night; All these make the maxillary muscles (muscle, pterygoid muscle, etc. Transitional exercise stimulates the development of muscles and bones in the mandibular angle area, and some patients have "square face deformity" due to heredity. ? Through the introduction of the above article, I believe everyone knows that in addition to developing good eating habits in adolescence, people who have already caused mandibular hypertrophy can also change their faces through mandibular angle plastic surgery to obtain exquisite faces.