Foot sprain usually can take early cold compress, later can take hot compress. 1. Cold compress: In the early stage of foot sprain, due to local tissue rupture and internal blood vessel rupture, it can lead to subcutaneous bleeding, which can easily cause local swelling, bruising and other abnormalities. Therefore, applying cold compresses within 72 hours after a foot sprain can prevent swelling from worsening, relieve pain and stop bleeding by inhibiting blood circulation and contracting capillaries. 2. Hot compress: 72 hours after the foot sprain, you can take hot compress. Hot compresses can promote blood circulation, dilate blood vessels, speed up the role of metabolism, help the absorption of local hematoma and local tissue repair. After the foot sprain can actively consult a professional doctor, and then carry out the correct cold compresses and hot compresses, to avoid improper operation on the body to cause harm. At the same time, we need to pay attention to the hot compress temperature can not be too high, to avoid causing burns.