Elevation of the affected limb for 7-10 days after the fracture is sufficient, because in the early stage of the fracture, the swelling gradually begins after the injury and gradually decreases until about 1 week after the injury, and if the affected limb is not elevated or the affected limb is lowered during this week, it will aggravate the local swelling. In addition, the affected limb will gradually appear to decrease after about 1 week of elevation. Elevation facilitates the reflux of the affected limb and reduces or accelerates the local swelling. After a period of elevation of the affected limb, the fracture can be lowered or lowered appropriately to adapt to the change in blood circulation and to prevent excessive local swelling after sudden low vertical.