Bump surgery is clinically known as orthognathic surgery and is indicated for severe deformities of the jaws or alveolar bones that are beyond the scope of orthodontic treatment alone. A convex mouth is mainly caused by protruding teeth, protruding jaws or protruding alveolar bone. When the deformity is not severe, it can be masked by orthodontic treatment. When it is difficult to be corrected by orthodontic treatment alone and severe jaw deformity exists, orthognathic surgery can be used. Orthognathic surgery is usually performed after growth and development is complete. Preoperative orthodontic removal of tooth substitutions is required to enable jaw surgery to be performed. Orthognathic surgery needs to be followed by orthodontic fine tuning of the teeth to help control recurrence of the deformity after surgery. When symptoms of convex mouth appear, it is recommended to consult the dentist as early as possible for early correction. If bleeding, swelling, infection and other symptoms occur after orthognathic surgery, it is necessary to pay great attention to it and consult the Oral and Maxillofacial Surgery Department in time for early treatment.