It takes at least 1 month for a ligament injury to heal. If the injury is relatively light, swelling is not particularly obvious, local slight pressure pain, consider the ligament part of the injury or part of the rupture, through recuperation, about 1 month the ligament can be completely grown, during this period should pay attention to not excessive walking, the affected limb to avoid weight-bearing activities. Local topical application of blood-activating and pain-relieving ointment can promote the healing of ligaments. If the ligament injury is more serious, there will be obvious local swelling, bruising serious when you can not walk, then you need to do MRI to further clarify the extent of the injury, if the ligament is completely ruptured, you need to do surgery to suture the ligament, and then fixed with a cast for 1 month, 1 month later you can do joint exercises, full recovery may take 6-8 weeks. After the ligament injury, you need to go to the hospital to do the relevant examination first, according to the degree of injury, choose different treatment methods.