Ankle joint difficulty is commonly caused by the following reasons: 1, degenerative osteoarthritis of the ankle joint: mostly occurs in elderly patients, the patient will have stiffness of the ankle joint, restricted activity and other uncomfortable symptoms, and even in the morning there will be obvious joint activity limitation, the patient will have obvious weight-bearing difficulties, walking distance shortening performance. Patients will find that the joint space is narrowed in X-ray, and MRI will find that the articular cartilage is degenerated or even the subchondral bone is cystic; 2. Inflammation of synovial membrane caused by cold in the ankle joint: it can lead to exudation, swelling, pain, limited activity and even stiffness of the joint. Once clinical manifestations such as difficulty in the foot and ankle joint appear, patients must be diagnosed and treated promptly to resume normal life and sports as soon as possible.