If the patient has a protruding foot tendon, it may be due to the presence of tendinopathy, dorsal foot superficial venous lesions, etc., as follows: First, tendinopathy: some patients will have such symptoms due to tendinopathy, such as having tendon sheath cysts. This kind of patients are often due to the overuse of tendons here, or by the case of smashing, there will be abnormal growth of tendons and tendon sheaths, and then lead to the local abnormal mass. Secondly, superficial venous lesions of the dorsum of the foot: some patients may have such symptoms due to superficial venous lesions of the dorsum of the foot, such as prolonged standing or direct violent blows to the dorsum of the foot, which may lead to varicose veins in the superficial veins mentioned above, after which abnormal bruises will be seen on the dorsum of the foot.