If the convexity of the mouth is the result of malocclusion, orthodontic treatment is needed to improve it. If it is the result of abnormal jaw development, then jaw surgery should be considered. Typically, there are a variety of ways to improve a convex mouth, but it is important to choose the right approach based on the specific cause of the convexity. If the convexity of the mouth is caused by malocclusion, patients should consider orthodontic treatment, which includes removable brackets, buccal fixed brackets, and lingual invisible brackets, which can improve the convexity of the mouth to a certain extent. Secondly, if the convexity of the mouth is caused by abnormal development of the jaws, then the patient needs to consider jaw reconstructive surgery, which includes double jaw surgery, mandibuloplasty and so on. In addition, patients need to correct bad habits in their daily life, such as breathing with the mouth open and biting the lips, which may make the convexity of the mouth more obvious. To sum up, people with convex mouth need to go to the hospital in time, do a series of relevant examinations to clarify the specific causes of convex mouth, and then cooperate with the doctor to take appropriate ways to standardize the treatment.