The ankle joint, commonly known as the ankle, is the junction of the foot and lower leg and consists of the articular surfaces of the lower ends of the tibia and fibula with the talus slide. The medial malleolus is called the medial ankle and the lateral malleolus is called the lateral ankle. There are ligamentous structures such as tibial collateral ligament and fibular collateral ligament in the ankle joint, which is a weight-bearing joint and plays the role of support and movement, so it is easy to sprain the ankle joint when walking or playing sports. Once the ankle is sprained, it can be treated by rest, oral pain medication such as ibuprofen, and immobilization in a cast. If the ligament tear is severe, surgery may be required. If ankle sprains are not treated in a standardized manner, they can easily lead to ligament laxity and habitual sprains, leading to joint instability. The ankle is a very important joint in the human body, and once a sprain or other condition occurs, you should go to the hospital in time.