Tenosynovitis can occur in the lower limbs, such as ankle tenosynovitis, posterior tenosynovitis of the inner ankle: first, the causes of ankle tenosynovitis include ankle trauma, rheumatic diseases, and cumulative strain injury, the above factors can cause inflammatory exudation between the transverse ligament of the calf and the tendon below it, as well as hyperplasia and edema, and involves the anterior tibialis muscle, the extensor digitorum longus, as well as the extensor digitorum longus, and the peroneus longus shortus muscle; the triggering factors for ankle tendinitis are related to excessive activities of the ankle such as dance performances, athletic games, and long-term bicycle riding. The trigger of ankle tenosynovitis is mostly related to excessive activities of the ankle, such as dance performances, track and field competitions, and long-term bicycle pedaling. Secondly, posterior tenosynovitis of the ankle is caused by excessive ankle exercise or localized injury, and the tendon sheath exudation and edema are more obvious.