At the time of a broken ankle, it is important to apply cold compresses, because at the time of injury there is a localized rupture of blood vessels and more bleeding. At this time through the cold compress can make the microvascular contraction, greatly reduce the local bleeding and soft tissue swelling, but also can reduce the pain. In 24 hours after the foot broken, you can change the cold compress to hot compress. At this time through the hot compress can make the local vasodilatation, can bring more abundant blood supply for the injured area. Thus, the local inflammatory factors and pain factors are taken away by the blood and cleared, which can relieve the symptoms, and is also conducive to the self-repair of soft tissue injury.