Convex mouth is a more common clinical facial shape, especially in the southern region, and the treatment methods for convex mouth are as follows: 1. Orthodontic treatment: commonly known as braces. It is suitable for those who do not have high requirements for appearance and cannot accept orthognathic surgery, and can correct the teeth through orthodontic treatment, which has certain effect on the convex mouth. 2. Orthognathic surgery: Through truncation, moving the upper and lower jaws backward and titanium plate fixation, the convex mouth deformity can be effectively treated. The surgery is less risky and generally does not result in bone loosening or tooth necrosis.