The upturned lips may be caused by anterior protrusion of the teeth, anterior protrusion of the maxilla, and hypertrophy of the upper lip, which can be corrected by orthodontic treatment, orthognathic treatment, and tissue removal surgery. 1. Anterior protrusion of teeth: If the lip is caused by anterior protrusion of teeth, it can be corrected by orthodontic treatment. By adjusting the coordination of teeth and facial bones through orthodontic devices, it can make the mouth and jaw system stable and beautiful, and can effectively correct the upturned lips. 2. Maxillary protrusion: the upper lip may also be caused by maxillary protrusion, you can take orthognathic treatment to correct, is to cut open the bones, the deformity of the jawbone is correct, through the fixation of the orthognathic effect, the upper lip has a better effect on the correction of warped lips. 3. Upper lip hypertrophy: Upper lip hypertrophy may also lead to lip curvature, can be corrected by tissue excision surgery, which is to make an incision on the inner side of the lip, remove the mucous membrane and excess fat inside the lip, and correct the phenomenon of lip curvature. If you need to correct your upper lip, it is recommended that you go to a regular hospital and choose the appropriate correction method according to your own situation.