Osteotomy of the periosteum is one of the common methods of orthodontic treatment, and there is no harm in having it done at a regular medical facility. However, some people may suffer from hemorrhage, lingual nerve numbness, facial infection and other complications after treatment. 1. Hemorrhage: Osteotomy generally needs to amputate part of the bone of the mandible to make the mandible shrink backward so as to achieve the purpose of correction, if the blood vessels are violated during the operation, it may cause hemorrhage. 2. Numbness of lingual nerve: If the surgeon is inexperienced and unskilled, he may accidentally damage the lingual nerve during the operation, which may lead to numbness of lingual nerve. 3. Facial infection: If you go to an irregular hospital or do not take good care of your face after surgery, it may lead to facial infection. It is recommended that patients go to regular hospitals for correction of paronychia, regular sterilization, and good postoperative care to avoid adverse consequences.