The best time to apply ice is within 24 hours after the injury, during this period of time due to the injury, bleeding will occur in the injury. The purpose of ice is to make the injured part of the vasoconstriction, reduce bleeding, because after the injury bleeding, swelling, in the later stages there through the use of drugs or natural absorption so that the swelling disappears, the injury can be healed. Hot compress time is after 48 hours of injury, in this period of time after the injury should be out of the blood has all come out, after 48 hours will need to exude blood or the formation of bruises fully absorbed, in order to accelerate the healing of the wound. In this period of time through the hot compress or use of blood stasis medicine, can effectively promote the elimination of swelling.