To solve the problem of postoperative swelling, there will be different degrees of swelling on the face after operation, which will gradually subside in about 3-7 days. If the condition improves about a week after the resection of mandibular angle hypertrophy, the suture can be removed. It takes about 1 month for the operation to completely reduce swelling. The masseter muscle itself will rebuild itself and shrink due to the change of attachment position and muscle tension in about 3-6 months, so the recovery will achieve the best effect in about 6 months after operation.