Treatment of medial collateral ligament injuries in the knee mainly includes conservative treatment and surgery. 1. Conservative treatment: Most patients with medial collateral ligament injuries can get better with conservative treatment. This is because most medial collateral ligament injuries without trauma are mainly caused by inappropriate activities. Conservative treatment includes: ice, immobilization, rehabilitation training, oral medication and so on. The purpose is to restore function and relieve symptoms. 2. Surgery: For trauma-induced medial collateral ligament injury, if the medial collateral ligament injury is more serious, the pain is more severe, the joint is unstable, affecting the normal joint function, and at the same time the imaging suggests that the injury is completely damaged, surgical treatment is often needed. The surgical approach mainly includes repair and reconstruction of the medial collateral ligament. The principle is to maximize the preservation of the original physiological and anatomical structures and to strive to restore maximum function.