Treatment of ankle sprain: When the joint suddenly moves to one side under the action of external force and exceeds its normal activity, it causes lacerations of soft tissues around the joint such as joint capsule, ligaments and tendons, which is called joint sprain. In mild cases, only part of the ligament fibers are torn, while in severe cases, the ligament may be completely ruptured or the bone at the attachment of the ligament and joint capsule may be avulsed, and even joint dislocation may occur. Joint sprains are most common on a daily basis, with the ankle being the most common, followed by the knee and wrist. Ankle sprains are the most common type of injury in everyday life. In daily life, for some reason the body loses its center of gravity, or steps on someone else’s foot when jumping up and landing, or the foot is stepped on and tripped during sports, etc., which may produce the movement of the foot rotating backwards, causing the lateral ligament of the ankle to be injured. Most patients, because there is no fracture after ankle sprain, neglect the management of lateral collateral ligament injury of the ankle, resulting in repeated ankle sprains and joint instability. Ankle sprains are very common in sports injuries, the most common of which is a posterior rotation injury of the ankle, or lateral collateral ligament injury of the ankle. The goal of treatment of lateral collateral ankle ligament tears is to return the patient to pre-injury sports levels as quickly and to the greatest extent possible. For freshly ruptured lateral collateral ankle ligaments, mild to moderate, non-surgical treatment can be used, but should be more securely fixed in a cast, replaced with a walking cast or walking boot after 1-2 weeks, followed by the use of an ankle brace for 3 weeks for better results. In the early stage of sprain, small blood vessels rupture and bleed, at this time, cold compress method can be used to lower the local temperature of the damaged tissues in a relatively short period of time. The low temperature can make the local blood vessel contraction, promote blood clotting, and also make the pain reduced. The earlier the cold compress, the better, so as to prevent further bleeding and pain. 24h after the change to hot compress. Hot compress method is not limited, but the temperature should not be too high to avoid local burns. The role of hot compresses is to promote the dissipation of bruising in and around the injury. Mild ankle sprains should be applied with cold compresses immediately after the sprain or contusion. To reduce the formation of hematoma. At the same time, you can apply topical medication to activate blood circulation and remove blood stasis. This will reduce the swelling and pain. In cases of severe torn ligament injuries, significant joint instability, or combined fractures, as well as old ankle instability, surgical treatment is required. The torn ligament severed ends should be surgically sutured together; ligament stop reconstruction should be performed when the ligament is avulsed from the stop and direct suturing is difficult. When cartilage or osteochondral injury is suspected in the joint, arthroscopic exploration should be performed to trim the cartilage lesion and remove the joint free body. Postoperative plaster fixation is performed for 3 weeks, and rehabilitation training such as joint mobility, muscle strength and proprioception is started early. Therefore, we must pay attention to the usual sprains, especially those injuries that are not fractured and that we think are not important. Only proper recognition and timely treatment can achieve good treatment results.