Protruding calf tendons may suffer from chronic venous insufficiency of the lower extremities. Chronic venous insufficiency of the lower extremities is a condition caused by venous reflux. Common symptoms are heaviness, fatigue, swelling and pain in the lower limbs. There are seven main categories of clinical manifestations: Category 1, conscious symptoms but no obvious signs. The second category, dilated capillary veins or reticular veins. The third category, superficial varicose veins. The fourth category, ankle or calf edema. Category V, skin changes hyperpigmentation, eczema, subcutaneous liposclerosis or atrophy. Category VI, skin changes, i.e., healed ulcers. Category VII, skin changes and active venous ulcers. They can be divided into three categories based on etiology: Category I, congenital abnormalities of valve structure and closure function. The second category, primary superficial or deep venous valve insufficiency. The third category, secondary venous valve insufficiency. Such as after deep vein thrombosis, the vein foreign lesion compression caused. According to the scope of lesions involved, they can be divided into: simple involvement of superficial veins, simultaneous involvement of deep veins, simultaneous involvement of superficial veins, deep veins and traffic veins. For superficial varicose veins as the main symptom, all of them should be judged from the four aspects of clinical manifestations, etiological classification, anatomical localization and pathophysiological changes through physical examination and a variety of special examinations, such as vascular ultrasound and lower limb angiography.