A sunken chin can be improved by orthognathic surgery and plastic surgery if you feel that it affects your aesthetic appearance. 1. If the sunken chin is caused by the congenital development of jaw retraction, orthognathic surgery can be performed to move the jaw forward if it meets the indications. At the same time, some acquired bad oral habits, such as open-mouth breathing, etc. can also be changed. 2. If the position of the mandible is normal and only the chin is sunken, which affects the aesthetics and meets the indications, plastic surgery can be used. Including filling with hyaluronic acid, autologous fat filling, prosthesis filling and so on. Sunken chin timely to the hospital, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.