The chin can be treated with orthodontics, injections and prosthetic fillers, and orthognathic surgery. 1. Orthodontics: If there is mild chin shortening, orthodontic treatment can be performed during the growth period to guide the growth of the jaw. 2. Injections and prosthetic fillers: If the degree of chin shortening or recession is severe, it can be treated by injections such as hyaluronic acid and fat fillers, or by prosthetic fillers, placing silicone or expandable prosthesis to lengthen and raise the chin. 3. Orthognathic Surgery: It can also be improved by orthognathic surgery, where the bone is amputated by incision in the mouth, and the amputated bone is shifted forward and fixed with titanium plate to achieve the purpose of extending the chin. Note that no matter what way to make the chin longer need to be in the doctor’s reasonable advice, go to the regular hospital treatment.