Mouth convex chin retraction for children and adolescents can be properly corrected through certain training, for adults whose growth and development have been completed can be considered orthodontics or surgery. 1. Appropriate training to correct. Mouth protruding chin retraction is commonly caused by children’s long-term biting, finger sucking or open-mouth breathing, need to correct open-mouth breathing, biting and other bad habits, jaw protruding symptoms will generally improve or correct. 2. Orthodontics or orthognathic surgery. If appropriate training can not be completely corrected or for adults, generally can be corrected through orthodontic teeth cover the relationship between the jaw, if there has been a bony deformity, but also consider orthognathic surgery. Mouth protruding jaw retraction is recommended to the hospital as soon as possible to intervene to avoid future surgical correction.