Correcting the shape of the mouth first needs to distinguish between the need to correct the shape of the lips, or the need to improve the shape of the mouth and lips through orthodontics, or even the need to improve the shape of the face through jaw correction. If the lip shape only needs to be corrected, then the lip shape can be corrected through injections, fillers or surgeries. For people with thin lips, hyaluronic acid injections can be used to improve the shape of the lips, while for people with thick lips, the shape of the lips can be improved through surgeries. If the lip shape problem is caused by teeth misalignment, maxillary protrusion deformity (buck teeth) and other reasons, then it is necessary to improve the lip shape through orthodontic treatment; in addition, double-maxillary protrusion deformity, anterior teeth anti-maxillary (Baotian), posterior teeth anti-maxillary, anterior teeth overbite and other problems can affect the lip aesthetics, and the need for orthognathic surgery, jaw bone correction in order to improve the shape of the mouth and lips.