The superficial veins of the lower extremities consist mainly of the great saphenous vein, the small saphenous vein and their collateral branches. The great saphenous vein is the longest vein in the human body. It originates from the medial aspect of the ankle, runs along the medial aspect of the calf, the medial-posterior aspect of the popliteal fossa, and the medial aspect of the thigh to the saphenous fissure in the inguinal region, and ultimately to the femoral vein. The small saphenous vein, which originates primarily from the lateral aspect of the ankle, is injected posteriorly along the calf and ultimately by the popliteal fossa into the popliteal vein. Clinically, due to the poor venous return of the lower limbs, the great saphenous vein and the small saphenous vein are prone to form superficial vein tortuosity, expansion, and formation of varicose veins, which is one of the most common superficial venous diseases of the lower limbs, and once varicose veins are formed, it is necessary to go to the vascular surgery department of the regular hospital for diagnosis and treatment.