Ankle sprains occur frequently in daily life, and most people have a history of ankle sprains in their own experience, but they often lead to chronic ankle instability or ligament damage that is difficult to heal because they do not give sufficient attention to it early or after the first sprain; therefore, orthopedic surgeons suggest that the “RICE (rice) principle” should be adhered to after an acute ankle sprain ” for treatment after an acute ankle sprain, i.e. rest, ice, compression and elevation of the affected limb. Rest (rest): After ankle sprain, sports should be stopped immediately, X-rays should be taken routinely, and if there is a fracture then a decision should be made whether to treat it surgically according to the fracture displacement. If there is no fracture, the affected limb should be routinely immobilized with a cast or ankle brace for about 4 weeks to facilitate ligament and soft tissue healing. Ice: Apply ice or cold compresses to the affected limb within 48 hours after the sprain to stimulate vasoconstriction and reduce bleeding and exudation to reduce pain and swelling at the sprained area. Compression (compression): use elastic bandage or splint to apply moderate pressure, which can reduce exudation and also help ligament repair. Elevation (elevation) of the affected limb: elevate the affected limb above the position of the heart, which can promote blood return and help the swelling to subside.