Saphenous varicose veins in the lower extremities are a common disease, especially in those who have long standing jobs, heavy physical labor, pregnancy, chronic cough or long-term constipation. However, traditional surgery is very traumatic and requires not only multiple local incisions, but also ligation and stripping of the diseased veins in sections, which is called “skinning and stripping”. Trauma, bleeding, pain, scars …… all kinds of surgical “by-products” make many patients go away. Nowadays, all this has become history, and now our department uses “saphenous vein foam sclerotherapy” to treat saphenous varicose veins, using this method only requires a small needle eye on the varicose vein, without anesthesia to achieve the real minimally invasive, this method has the following advantages: ① completely eliminates the reflux of the saphenous vein trunk, greatly reducing the chance of re-operation after the operation; ② the foam sclerotherapy has the following advantages The foam sclerosing agent has a stable molecular concentration, and the contact area with the vessel wall is increased, so it is easy to form retention in the vessel, which has a good effect on the treatment of varicose vein group; ③ Small trauma, small incision, no scar residue and pigmentation after surgery, the original pigmentation can be reduced or disappeared, and it does not affect the beauty of the limb; ④ Few postoperative complications, and the recurrence rate is reduced; ⑤ This method is simple to operate, quick recovery, and does not ⑤ The method is simple, quick recovery, and does not affect normal work; ⑥ The postoperative hospitalization time is shortened, and the medical cost is significantly reduced, alleviating the economic burden of patients.