After a fracture, three characteristic manifestations occur. The first one is abnormal movement. This abnormal movement is due to the formation of an unusual activity of the fracture ends in the affected limb, known as abnormal movement. The second one is called deformity, which is also due to a significant deformity in the affected limb after the fracture ends. The third one is called bone crepitus, also known as bone rubbing sound, which is the sound produced when the fracture ends rub against each other. These three are specific signs of a fracture. In addition to these three, there will also be severe pain in the affected limb, and this pain is very intense, rendering the limb immobile. Secondly, there will be obvious swelling, which is caused by bleeding in the medullary cavity of the fracture ends. The third is functional impairment, as the affected limb will definitely be immobile after the fracture.