Many patients ask if just treating varicose veins by sclerotherapy works well and what conditions sclerotherapy is suitable for, the following is an explanation of this problem. Sclerotherapy for varicose veins has gone through several stages. 1853 was the first time that sclerotherapy was used for the treatment of varicose veins, and the early sclerosing agents were mainly used to achieve the purpose of treatment by corroding the normal tissues of the blood vessels, such as carbolic acid, but they were rarely used because they were easy to cause venous thrombosis and septic infection at the same time as treatment. Later people gradually began to use 5% cod liver oil acidification, mainly by stimulating the inflammatory reaction of the intracellular lining, so that the intima adheres to the varicose vein and eventually makes the varicose vein fibrosis blocked, thus playing a role in eliminating and reducing venous hypertension, but it is relatively little used because it is easy to cause allergic reactions, itching and pain, and easy to form hard nodules. Now the sclerosing agent used in our hospital is new foam sclerosing agent, foam sclerosing agent because of its simple, minimally invasive, effective and rapid characteristics in the western countries have more applications, the most is sodium tetradecyl sulfate and polyethylene glycol monododecyl ether, etc., now our hospital used for domestic production of polyglaucine injection, and polyethylene glycol monododecyl ether composition is the same, initially used for endoscopic hemostasis of esophageal variceal bleeding and variceal veins Sclerotherapy has the characteristics of using small dose that can spread to a large area with extensive contact with the vein lining, long retention time in the blood vessel, and stable molecules of the surface agent, and now I have used sclerotherapy as one of the joint methods of treating varicose veins, and have done more than 200 cases. After sclerotherapy, press for one minute to make the sclerosing agent fully contact with the wall of the tube to close the vessel, and then apply local compression with elastic bandage, and the following activities can be done after half an hour after surgery. The advantages of sclerotherapy are: 1. short course, outpatient treatment, patients do not need to be hospitalized or hospitalized for a day can be discharged. 2. relatively low cost. 3. less pain, do not need to make incisions, will not leave surgical scars 4. can be repeatedly treated. The disadvantages are: there is no complete cure for varicose veins, the recurrence rate of sclerotherapy alone without joint saphenous vein high ligation is 100%; it is easy to recur, for the overall treatment is not complete. Considering all, I think that sclerotherapy when used independently is suitable for the following cases: capillary dilatation or reticular venous dilatation; light degree of local varicose veins and urgent treatment time; mild to moderate regurgitation of saphenofemoral valves in young women with limited varicose range mainly for cosmetic reasons, focusing on leg appearance; postoperative recurrence or failure to deal with residual varicose veins due to intraoperative flattening. In conclusion, varicose veins in the lower extremities are a complex disease, and patients need to choose appropriate and scientific means when seeking medical care, not blindly. Sclerotherapy can never cure varicose veins, but can only control the expansion of local superficial varicose veins over a period of time. Sclerotherapy is effective, but sclerotherapy is prone to recurrence and is not complete.