When the child’s fracture was reviewed, the most common question the doctor heard was “Doctor, are the bones growing well?” This is not true. Parents often think that if the fracture site fits well, the bone will grow well, but this is not accurate. After the fracture, the bones look tightly jointed, not necessarily good growth, good growth refers to good healing, and the fracture end is not necessarily proportional to the healing situation. How does a broken bone actually heal? What does good growth have to do with it? In fact, the most important factor affecting fracture healing is the bone scab, which is formed by the periosteum and hematoma. During a fracture, the surrounding blood vessels and muscles are also damaged, causing bleeding and the formation of a hematoma at the broken end of the fracture. The hematoma stimulates the regeneration of capillaries and fibroblasts at the fracture end and grows from both ends of the fracture into the hematoma at the same time; at the same time, the injury and ischemia caused by the fracture leads to necrosis of some soft tissues and bone tissues, causing an inflammatory response that removes the necrotic tissue and accumulated blood and stimulates the hematoma to mechanize and form granulation tissue, followed by fibrosis to form a fibrous bone scab. The periosteum is a membrane that wraps around the surface of the bone and has the function of osteoclasts. When a fracture occurs, the osteoblasts of the periosteum at both ends of the fracture divide and proliferate to form new bone and calcify continuously, gradually converging toward the fracture; at the same time, the fibrous tissue formed by hematoma mechanization is sandwiched in the middle to form bone scabs and calcify continuously to strengthen them, which can eventually resist external forces, indicating that the fracture has healed. Therefore, if there is an intact periosteum and hematoma after the fracture, a completed bone scab can be formed and the broken bone can be reattached. This ring of scab around the broken bone acts like an electric weld, firmly welding the two ends of the bone together. Over time, the scab will slowly be absorbed. If the fracture follows this process gradually, it is growing quite well. Never operate repeatedly in the process of fracture repositioning in the pursuit of perfect alignment, or even cut and reposition, destroying the integrity of the periosteum and hematoma, or damaging the blood vessels and nerves, which will instead affect the later healing. The doctor will not pursue the alignment too much in the process of repositioning, it is enough to meet the basic requirements, the child’s healing and shaping ability is very strong, usually can recover well.