Convexity of the mouth can be improved by orthodontic treatment, and in severe cases, surgical treatment is required. 1. If the convexity of the mouth is caused by a simple dental problem, it can be treated by orthodontic treatment, and the appearance can be improved by retracting the teeth. 2. If it is caused by abnormal development of the jaws, such as overdevelopment of the maxilla or underdevelopment of the mandible, it can be improved by functional orthodontics during childhood development, and if it is an adult, it needs to be analyzed by radiographs, and some can be corrected by extracting the teeth, and serious cases need orthognathic surgical treatment. All, convex mouth can be functionally corrected in childhood, and need orthodontic treatment or orthognathic surgery treatment in adulthood, the specific conditions need to go to the hospital stomatology department.