The clinical manifestations caused by simple varicose veins of lower extremities are generally not serious, mainly manifested as meandering and dilated tortuous veins of lower extremities, if the disease continues to progress, to the later stage, especially when the traffic vein valves are destroyed, mild swelling and nutritional changes of skin in the foot and boot area may appear, including skin atrophy, desquamation, pruritus, hyperpigmentation, hard nodules of skin and subcutaneous tissue, even eczema and ulcer formation. 1, saphenous vein valve and saphenous vein and deep vein traffic branch valve function test Lie on your back, elevate the affected limb, tie a tourniquet in the upper 1/3 of the thigh, after standing, do not relax the tourniquet, if within 30 seconds, see the veins below the tourniquet filling rapidly, it indicates that there is a traffic branch vein valve insufficiency below the tourniquet; if after relaxing the tourniquet, see the veins filling rapidly from top to bottom, it means the saphenous vein valve function insufficiency. The results and significance of saphenous vein valve and traffic branch valve function test between the small saphenous vein and deep vein are similar to the above tests. 3.Localization test of communication branch of valve insufficiency Lie on your back, elevate the affected limb, tie a tourniquet at the root of the thigh, first tie the first elastic bandage from the toe up to the popliteal fossa, then tie the second elastic bandage from the tourniquet downward, let the patient stand, untie the first elastic bandage downward while continuing to tie the second elastic bandage downward, if varicose veins appear in the gap between the two bandages, it means If the varicose vein appears in the gap between the two bandages, it means that there is a traffic branch vein with incompetent valve. If the varicose vein is aggravated, it means the obstruction of deep vein is reduced or disappeared, it means the deep vein is open.