Varicose vein disease of the lower extremities, also known as primary lower extremity venous insufficiency, is a venous reflux disease of the lower extremities. The incidence is high, with about 10-15% of adult men and 20-25% of adult women developing symptomatic lower extremity venous insufficiency. It is mainly due to venous valve insufficiency, weakness of the vein wall and persistent pressure rise in the vein, and it occurs in people who are engaged in long standing work, high intensity of physical activity, or long standing and less sitting, while pregnancy, chronic cough, long-term constipation, etc. can also cause persistent pressure rise in the vein, which can easily lead to varicose veins, and the disease has a genetic tendency. The common symptoms of varicose veins are sinuous, dilated and twisted superficial varicose veins in the lower extremities, which are more obvious in the lower legs than in the thighs and are more obvious after standing, but reduce or disappear after raising the legs. This disease often appears in the late stage due to skin nutrition disorder and calf skin atrophy, desquamation, itching, pigmentation, skin subcutaneous tissue sclerosis, and even eczema and chronic ulcers (commonly known as “old rotten feet”), serious cases have the possibility of malignant transformation of chronic ulcers. 1, early onset: the affected limb soreness and discomfort, heavy weakness, obvious when standing, after walking, lying down or limb elevation to reduce, or even pain. 2, late onset: pigmentation, skin desquamation, atrophy, skin and subcutaneous tissue sclerosis, eczema, refractory ulcers, thrombosis and other complications due to skin nutritional disorders. The traditional surgical treatment method has been around for more than 100 years, the main surgical method is high ligation and stripping, which is basically divided into three steps: namely high ligation of large or small saphenous veins, stripping of varicose veins, ligation and cutting off the traffic veins. Characteristically, the procedure is more thorough, but it is not easily accepted by patients because of the high trauma, bleeding, slow recovery and relatively many post-surgical complications. Microwave endovenous therapy is a new type of minimally invasive treatment method. It applies a special microwave varicose vein treatment instrument to treat varicose veins in the lower limbs, using microwave energy to coagulate and occlude the entire diseased large (small) saphenous vein. The superficial veins of the lower extremities are blocked from returning to the heart, so that the blood is diverted from the deep veins of the lower extremities back to the heart; at the same time, the varicose veins and the diseased traffic branch veins are treated with microwave energy to achieve the purpose of minimally invasive treatment of varicose veins in the lower extremities. Advantages: this method is more thorough in the treatment of varicose veins of lower extremities, less likely to form deep vein thrombosis, simple anesthesia, simple surgery, less time consuming surgery, less intraoperative bleeding, shorter hospital stay, precise results, less trauma to patients, less pain, faster recovery, and no obvious complications. Relatively speaking, the microwave surgical treatment instrument for surgery is economically priced and easy to promote in general primary hospitals. Before and after treatment comparison