Varicose veins of the lower limbs are common peripheral vascular lesions, whose main manifestation is superficial varicose veins of the lower limbs due to the return obstruction and reflux in the saphenous veins or deep veins. However, varicose veins of the lower limbs can appear with the development of the disease process, skin trophic disorders in the lower limb boot area, manifested as itching, eczema, deepening of skin pigmentation, ulceration. The incidence of this disease is high, accounting for 90% of peripheral vascular lesions, but only less than 20% of patients with lower extremity boot area skin eczema ulcers. With the advent of a variety of advanced investigations, the role of the traffic veins has received increasing attention. At present, it is believed that simple varicose saphenous vein as well as mild dilatation of deep veins, impaired reflux and reflux cannot cause eczema and ulceration of the skin in the ankle area. Only in the case of deep vein reflux obstruction accompanied by traffic branch valve insufficiency, the skin eczema and ulceration in the boot area can appear. Therefore, the function of traffic branch valves plays an important role in the nutrition of the skin in the boot area. Traffic branch vein is located at the back of the calf, and the 3 traffic branch veins at the back of the calf from the sole of the foot at 13-24cm are more fixed, which mainly drain the blood from the superficial vein into the deep vein. When the superficial vein reflux is impaired, the blood flows to the deep vein through the branch veins, causing the deep vein to increase in tension and dilatation. When the deep veins flow smoothly and the valves function well, it will not cause deep vein regurgitation. When the deep vein valve function is defective, deep vein reflux occurs, gradually causing dilatation of the traffic branch veins, valve function is impaired, resulting in blood reflux into the boot area, so that the local blood stasis, affecting the metabolism of the local skin tissues, resulting in skin nutritional disorders, skin hyperpigmentation, eczema, ulcers form, and are not easy to heal.