There are several common causes of pain in the inner ankle: 1. The ankle joint is stimulated by adverse factors, including cold, sudden cold, sudden hot stimulation and moisture stimulation, resulting in reactive inflammation and pain in the inner ankle. 2. Chronic strain of the ankle joint, caused by long-term weight-bearing walking or overuse of the ankle joint, resulting in strain pain of the inner ankle. 4. Arthritis of the ankle joint, including rheumatoid arthritis, rheumatoid arthritis, gouty arthritis, synovial arthritis, synovitis and other causes of pain in the inner ankle. It is recommended to go to the hospital for examination and take appropriate treatment after clear diagnosis.