Whether or not a knee ligament injury can heal on its own is largely determined by the condition of the injury. If the injury is only a ligament injury without a ligament rupture, it can heal on its own after rest and avoiding strenuous activities. Ligament injuries depend on the extent of the injury. If the ligament is simply damaged without rupture, the ligament can heal on its own after rest. However, in the early stage of injury, it is still recommended to use protective brace for protection. It takes 6-8 weeks for a ligament injury to heal. If the ligament is completely torn, surgical repair is required. If direct suturing is not possible, the tendon will need to be replaced with an allograft or autologous tendon. During the treatment of knee ligament injuries, patients should not do strenuous exercises, but rest and do not overexert or overload the knee joint. In addition, patients should avoid spicy and irritating foods, eat more calcium-rich foods, take vitamins, and get more sunlight to help recover from the condition.