After twisting the foot, generally within 72 hours you can choose ice, more than 72 hours after you can choose hot compresses. Minor foot sprain, can be combined with ice hot packs, if the foot sprain pain and swelling is obvious, accompanied by activity limitation, should promptly seek medical attention, to avoid delaying the condition, affecting the later recovery. Ice packs need to use a towel wrapped ice bag, to avoid direct contact with the skin, frostbite skin. After twisting the foot, the local blood vessels may rupture within 72 hours, resulting in bleeding, edema, pain, ice can make the local vasoconstriction, to achieve the effect of stopping the bleeding and pain, after 72 hours, the general local has basically stopped the bleeding, heat can promote blood circulation, to achieve the effect of swelling and activation of blood stasis. If there is any discomfort, you should consult a doctor in time.