A tendon pain in the ankle is considered to be related to chronic strain, acute trauma, arthritis and so on. 1. Chronic strain: generally seen in manual laborers, the tendons and ligamentous tissues around the ankle joint are chronically strained for a long time, resulting in tendon pain. 2. Acute trauma: due to strenuous exercise, tendon strain leads to local soft tissue edema, blood return obstacles, and swelling and pain. 3. Arthritis: Degenerative changes in the ankle joints can lead to osteoarthritis, or gouty arthritis or rheumatoid arthritis, which can also cause ankle pain. It is recommended that after the discovery of ankle swelling and pain, timely medical treatment, clear cause and then treatment, not self-treatment, so as not to delay the condition.