Forehead shape is not full, forehead due to various reasons caused by local depression, both sides of the asymmetry, etc. can be improved through forehead filling surgery. There are soft and hard forehead filling materials, the former is generally used for limited soft tissue depression, available materials such as autologous fat, fascia tissue, artificial collagen, etc. The latter is mainly used for bony defects and is the most commonly used to change the shape of the forehead, including autologous bone and synthetic materials. The most commonly used clinical substitutes are expanded polytetrafluoroethylene, expanded polyethylene, medical solid silicone, etc. The first two have good tissue compatibility, and the surface of the prosthesis has microporous, which is conducive to tissue growth and more solid fixation. Silicone prosthesis is easy to sculpt, inexpensive, but should not be too large and thick, there is a risk of displacement due to gravity. The following mainly introduces the frontal filling of synthetic materials: 1. Pre-operative preparation: plasticize the frontal skin with materials such as rubber cement and dental impressions, determine the filling range, shape and thickness. Then mark on the skin. Pre-operative routine examination should be done: no bleeding, infectious diseases and important organ diseases, women avoid menstruation. 2.Surgical incision selection: facial filling can be done in the hairline, within the eyebrow, on the eyebrow, etc., and full frontal filling can be done with a coronal scalp incision or bilateral temporal incisions. 3.Surgical procedure: performed under local anesthesia or general anesthesia. Along the incision, enter the capitellum-frontalis layer, also can be subconsciously separated under the periosteum, form a cavity in the marked area, put the filling material spreading into it, and the edge can be fixed with several stitches. Place drainage, suture the incision, and apply pressure bandage. 4.Postoperative treatment: 24-48 hours after surgery, drainage is removed and the frontal area is bandaged with pressure for one week. The stitches were removed 5-7 days after surgery, and antibacterial agents were given to prevent infection. 5.Complications: infection, hematoma, seroma, numbness of the incision, rejection of the filling, unsatisfactory shape, etc. are possible. Choosing a regular large hospital and an experienced physician can minimize the occurrence of complications.