Most of the time, periosteal breaks can heal on their own if there is no defect, but when the break is combined with a defect or necrosis, it may not heal on its own. The periosteum is divided into two layers, the outer layer contains blood vessels, nerves and fibrous tissue, and the inner layer is rich in osteoblasts and osteoclasts, and the ability of the periosteum to heal itself is mainly dependent on blood supply. If the periosteum is broken without defects, with the generation of fibrous tissue and the recovery of blood supply, the periosteum can be self-healed in most cases. If a simple fracture results in a periosteal tear, the healing of the periosteum can promote healing of the fracture as the periosteum heals. If the periosteal fracture is combined with periosteal defect or necrosis, such as comminuted fracture, large periosteal contusion caused by disfiguring limb injury, or periosteal necrosis caused by infection, etc., due to the serious damage of periosteal blood supply, the periosteum usually cannot heal by itself. It is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and then give targeted treatment or treatment.