After the foot sprain is 72h for hot compress, if the hot compress is relatively early may lead to local sprain caused by the rupture of blood vessels increased seepage, resulting in the formation of local swelling and inflammatory edema aggravation, is not conducive to late recovery. After 72h, the local blood vessels have already closed, which can lead to vasodilation and effectively promote arterial blood supply and venous reflux, which can provide more energy and electrolytes and help recovery. The increased venous return can promote the metabolism and absorption of local inflammation and metabolites such as bruising, which can help relieve the symptoms of foot pain and promote the elimination of local swelling, which can promote recovery. The most critical treatment after a foot sprain is to take external fixation, choose a brace or ankle brace, you can also choose a cast, so that after fixation can let the ligaments and muscle tissues of the injured position fully relax and rest, to avoid aggravation of the injury, and will not lead to the formation of local scar tissue after the decline in elasticity and toughness, the formation of habitual sprains and other problems.