The back of the foot sprained and swollen, must be clear sprain at the same time whether accompanied by fracture, so first to shoot X-ray, swelling methods are as follows: First, there is a fracture: if clearly have a fracture, to carry out the plaster braking, and then the lower limbs will be elevated, so the fastest elimination of swelling, and is conducive to the return of blood to the swollen parts of the limb. If the fracture is displaced, poor alignment should be surgical treatment to restore the fracture alignment, the fastest way to eliminate swelling. Second, no fracture: if the X-ray did not observe the phenomenon of fracture, can be fixed with elastic bandage, at the same time to prohibit walking on the ground, the fixed period should also be elevated feet, is conducive to the subsidence of swelling. General simple soft tissue injury, the swelling period is about two weeks.