The flat back of the head can be restored to fullness by adjusting the sleeping position, injecting medication or implanting silicone prosthesis and other ways. 1. Adjusting sleeping position: applicable to infants and young children, while the bones of adults have already been shaped, adjusting sleeping position can not be improved. For infants and young children with flat back of the head, parents need to intervene appropriately in their sleeping position, and they can sleep on their side to minimize the pressure on the back of the head, which will help to restore the fullness of the back of the head. 2. Injections or implantation of silicone prosthesis: For adults whose bones have already been shaped or those who have a clear deformity of the back of the head, they can seek medical treatment through local injections of sodium hyaluronate and implantation of silicone prosthesis to make the back of the head full again. 3. Other methods: mainly include injection of autologous fat cells, wearing braces, implantation of synthetic bone and so on. It is recommended that people with a flat back of the head visit a regular hospital and choose a suitable improvement plan after a comprehensive assessment by a doctor. Daily attention to adjust the state of mind, avoid excessive anxiety, but also by wearing a hat to cover the way, play a visual aesthetic role.