Ligament strains are mostly due to sprains, or due to violent injuries such as traffic accidents or falls, when the following clinical manifestations can occur: 1, pain, in the ligament strains due to the rupture or partial tear of the ligament, resulting in obvious pain at the injury, especially when the joint movement is very obvious. 2, swelling and bruising at the injury, after the ligament strains can not have a small amount of bleeding, when it can The ligament strain can be accompanied by damage to the surrounding soft tissues, which can also show obvious swelling. 3, the limitation of joint movement, due to the instability of the joint after the ligament strain, there can be obvious limitation of joint movement. After a ligament strain, an MRI should be performed to see the extent of the ligament tear, and the corresponding treatment should be carried out according to the extent of the tear.