Six months after the fracture occurs, the fracture site may become painful and swollen, and the fracture site may still not grow through x-rays. This symptom is collectively known medically as a non-healing fracture. The following triggers may cause the fracture end not to heal for a long time after the fracture and require your vigilance. Patients with fractures can heal as quickly as possible after plaster fixation, plate internal fixation plus a period of recuperation. This is due to the fact that the bones in our body have very good regenerative and repairing ability, which ensures that our bones can repair themselves in time after the injury. However, I have found that a few patients experience pain and swelling at the fracture site 6 months after the fracture occurs, and the fracture site still has not grown through x-ray observation. This symptom is collectively known medically as a non-healing fracture. The following causative factors may cause the wound not to heal for a long time after the fracture and need to be alerted. Trigger 1: The age and weakness of the fracture patient makes the systemic circulation decline leading to a significant decrease in the ability of the bones to repair themselves, slowing down the healing time of the fracture. Trigger 2: The seriousness of the fracture patient’s condition and the abnormal blood circulation to the fracture site causing bone ischemia can also cause the occurrence of non-healing fractures. Trigger 3: Fracture patients with misalignment, unstable fixation, insufficient functional exercise, and local infection during treatment and care can also trigger fracture non-union.