Patients with fractures are most concerned about when my bones will grow and often complain about why my bones are growing so slowly. When will I be able to go down to the ground? As we all know, the human body is an organic whole, and one hair moves the whole body. The healing of fractures is also a very complex process. There are many relevant factors, let me introduce to you one by one A. Systemic factors 1, age: older than younger bones grow slowly. Children, with the strongest growth and development ability, also have the strongest fracture healing ability. Older people, compared to younger people, even if they are usually in good health, several aspects of their body functions are deteriorating, which is an objective law that cannot be changed. 2, health status: fracture healing process, is the need for a variety of “raw materials”, usually long-term bedridden, poor nutritional status of patients, naturally can not meet the needs of the bone healing process on the intake of nutritional elements. 3, smoking: a large number of experiments and clinical studies at home and abroad found that cigarettes in the combustion of nicotine, nitric oxide, carbon monoxide toxic substances to the human body. Nicotine can cause vasoconstriction and spasm, reduce the blood supply to the fracture, inhibit vascular growth, prevent early re-vascularization of bone, weaken the function of osteoblasts, and affect fracture healing. 4, osteoporosis: also common in the elderly and long-term bedridden patients, it brings the patient’s own calcium, phosphorus and other “raw materials” needed for bone healing is insufficient, the second is the speed of bone resorption than the speed of bone growth, resulting in poor quality of fracture healing. Local factors 1, the type of fracture: the more crushed the fracture, the greater the violence to the limb at the time of injury, the heavier the injury, the slower the bones grow up. 2, the condition of local skin and other soft tissues: local soft tissues include the skin and muscles around the fracture. When the initial injury occurs, there is a rupture, we call it an open fracture. If there is no wound, we call it a closed fracture. If the skin is cracked and the muscle or even the bone is exposed, the injury is very serious. The bone grows one by the blood supply inside the bone, which we call intramedullary; and the other by the blood supply of the periosteum and surrounding tissues, which is more extramedullary. If a bone like this is completely exposed, all the blood flow inside and outside the marrow is destroyed, and the bone grows slowly. 3, infection: the old director always told us that once the wound is infected, it is catastrophic for both the patient and the doctor. 4, the site of the fracture: the calf is the most likely part of the fracture does not heal, because of the special structure of the calf decision. The calf is the skin and bone, the front inner side is not covered by muscle, the blood supply to the surrounding tissues is insufficient, and improper treatment can easily lead to non-healing fractures. 3. Treatment factors Improper treatment by doctors, incorrect choice of fixation, excessive surgical operation, too extensive damage, and poor timing of surgery can also lead to slow growth of the bone, or even failure to grow. In conclusion, the healing process of fracture is a complex and continuous process, which requires active cooperation between doctors and patients, and once problems arise, timely adjustment of the treatment plan will surely achieve satisfactory results.