How long it takes to return to sports after a medial collateral ligament tear depends mainly on the degree of injury, with the average recovery time for mild cases being 10 to 14 days, and for severe cases, it usually takes 1 to 2 months to be able to play sports. After tearing the medial collateral ligament of the knee, the knee joint gap increases and the stability of the knee joint will be affected, causing localized pain and thus limiting activities. If the degree of tear is mild, patients generally need to brake for 10 to 14 days before exercise; when the degree of ligament tear is more serious, it usually takes 1 to 2 months to repair, during this period, to limit the knee flexion and extension and weight-bearing activities, so as to create an environment for the repair of torn ligaments. If a patient has a tear of the medial collateral ligament, the doctor will evaluate the patient after standardized treatment and tell the patient when he or she can return to sports.