The need to expose the end of the injured limb after fracture fixation is due to the need to observe the blood supply to the distal limb of the fracture. This is because after the fracture, the fracture break will be significantly displaced, causing the surrounding nerves and blood vessels to become entrapped. If the vascular compression is severe, it will trigger an impaired blood supply to the distal limb, and even more severe fractures will puncture the artery, and once the artery is broken, there will be no blood supply to the distal limb. At this time, if the distal limb is not well observed, it is easy to miss the symptoms of inadequate blood supply, which will make the distal limb necrotic, thus not being able to preserve the limb and only being able to do amputation treatment.