In everyday sports, especially in basketball, we often hear people say “I sprained my foot”. In fact, this is an ankle sprain, which is one of the most common sports injuries. According to the data, ankle sprains account for 30% to 40% of sports joint injuries. Most ankle sprains are caused by overstretching or tearing of the ligaments around the joint, and in severe cases, they can be accompanied by avulsion fractures around the joint. The ankle joint is an important pivot and weight-bearing joint of the human lower limb movement, and its condition directly determines the quality of life and movement of people. So why is the ankle joint more prone to injury? The ankle joint is prone to sprains because of its function and its anatomical structure. When the ankle is in plantar flexion (i.e., doing foot pads), the foot tends to turn inward, i.e., the center of the foot turns inward. The unique anatomical structure of the ankle joint cannot match well at this time, and it is in an unstable state of “flexible but not stable”. Therefore, if people lose their balance during the movement of the ankle joint in plantar flexion (such as going downstairs, going downhill, or landing after jumping), it will easily cause the joint to turn inward excessively, resulting in lateral ankle sprain. Data show that lateral ankle injuries account for about 80% of all ankle sprains. The soft tissues within the ankle joint are crushed and impacted, causing damage to the articular cartilage surface and swelling of the synovial membrane, resulting in swelling and bruising around the ankle joint. If proper treatment is not provided in a timely manner, there is a decrease in the strength of the lateral support of the ankle joint and decreased proprioception of the joint. In turn, the instability of the ankle joint is aggravated and the joint is prone to re-traumatization, resulting in chronic symptoms such as pain, swelling and unstable walking, which may cause other joint injuries and a chain reaction over time.