The common reasons for mouth cocking include malformation of teeth and abnormal development of jaws, etc. It may also be caused by over-thickness of lips, which needs to be clarified first and then corrected in a targeted way. 1. Malocclusion: If malocclusion causes mouth curvature, you can wear braces to correct it, and the phenomenon of mouth curvature will be improved after the teeth are corrected. 2. Abnormal jaw development: some people’s mouths may be abnormal and abnormal jaw development, this situation requires orthognathic surgery to correct the abnormal development of the jaw, so as to improve the phenomenon of the mouth. 3. Excessive thickness of the mouth: If the mouth is too thick, the common solutions include lip thinning surgery, etc. It is recommended to go to a regular hospital for examination. It is recommended to go to the regular hospital for examination to clarify what causes mouth curvature, and then select the suitable solution.