It is still possible for a bone scab to grow and cause displacement. In the treatment of fractures, if there is a strong internal fixation and a bone scab has grown, it is most likely safe. Even if the bone scab is not completely healed, the strong internal fixation will ensure that the fracture will not dislocate during movement. If the fracture is treated conservatively, it is possible that the fracture may be displaced despite the growth of a scab. Only when the bone scab is completely wrapped around the fracture end and the fracture line is gradually blurred or even disappears, it means that the fracture end is stable and will not lead to displacement. Otherwise, the fracture will not be fixed by the formation of the external bone scab, which may lead to re-displacement of the fracture.