Sprained foot in the first 72 hours generally take cold compress, after 72 hours generally take hot compress. Within 72 hours of a foot sprain, local swelling, bleeding, pain, limited mobility, etc. At this time, cold compresses have the effect of contracting capillaries, which can relieve pain and reduce bleeding. After 72 hours, hot compresses can promote local blood circulation, which can help hematoma absorption, improve swelling, pain and other manifestations, so that the body can get faster recovery. If you have a sprained foot, you should go to the hospital in time to make a clear diagnosis, and the doctor to develop a scientific treatment program, do not blindly operate on your own, so as not to delay the condition.