Knee ligament injuries first require us to determine which ligament is damaged. The injury mechanism can help determine which ligament is affected, such as an inversion or eversion injury of the knee, which could cause damage to the medial or lateral collateral ligaments of the knee. Sometimes, knee flexion and rotation injuries may damage the cruciate ligaments of the knee. Once the specific ligament is identified, the extent of the injury must be determined. If the injury is minor, such as a contusion, rest may allow the ligament to gradually recover. If there is a tear, but the knee joint is still stable, conservative treatment can be pursued; however, if there is a tear and the knee joint is unstable, or if the ligament is completely ruptured, we recommend surgical repair to restore the stability of the knee joint.