After the knee ligament tear in the acute period can not be hot compress, should be cold compress; after the acute period can be hot compress. Knee ligament tear injury in the acute phase often have pain, local hematoma or joint swelling and knee joint activity limitation, the acute phase belongs to the bleeding period, hot compresses will promote blood circulation, bleeding more, resulting in more serious condition. Generally, cold compresses should be applied within 72h to reduce tissue bleeding and exudation and reduce pain. 72h later, hot compresses, massage infrared and other therapies can be applied to promote local blood circulation, increase tissue fluid reflux and reduce swelling and other symptoms. Knee ligament tear should be timely to the hospital, under the guidance of the doctor standardized treatment, to avoid home treatment leads to aggravation of the condition.