Most strains of the collateral ligaments in the knee are caused by strenuous exercise and usually require rest with external immobilization of the knee in a cast or brace for a period of 4-6 weeks, with bed rest being the mainstay. The ligaments surrounding the knee include the medial collateral ligament, the lateral collateral ligament and the anterior and posterior cruciate ligaments. The ligaments are critical to the stability of the knee joint and recovery time after a strain is determined by the severity of the injury and the treatment method. Strenuous exercise is not recommended in the short term after a ligament strain to avoid aggravating the ligament injury, but patients can perform appropriate functional exercises under the protection of a brace, and most patients need to be bedridden for about 4-6 weeks to heal. In addition, patients should elevate the knee joint during bed rest to reduce the local inflammatory edema and bruising swelling, pay attention to warmth, and take oral anti-inflammatory and pain-relieving drugs as well as traditional Chinese medicine to promote blood circulation and reduce swelling to help the recovery of the disease.