Within 48 hours after the appearance of lumbar sprain can be treated with cold compresses, generally can use cold towels or frozen mineral water wrapped in towels after cold compresses on the affected area, 4-6 times a day, 20-30 minutes each time. This is mainly due to lumbar sprain within 48 hours of the beginning of the active bleeding period, soft tissue injury will lead to capillary rupture and bleeding, the use of cold compress treatment can make capillary constriction, can reduce bleeding and reduce local swelling and pain symptoms. 48 hours later, because the bleeding has basically stopped, the injury will appear hematoma, and hot compress can improve local blood circulation, promote hematoma subside, so Hot compress can be used only after 48 hours of sprain. If the hot compress treatment is carried out too early, it will lead to increased bleeding and aggravate the swelling and pain.