Varicose veins of the thighs are considered to be varicose saphenous veins of the lower limbs. The classic and reliable surgical procedure is high saphenous vein ligation + saphenous vein stripping. Saphenous vein high ligation + stripping is performed by making an oblique incision below the groin to locate the saphenous vein and ligating each of the five confluent branches, and then removing the saphenous vein by segmental ligation with a stripping device. Varicose veins of the saphenous vein are caused by the destruction of the valves in the vein and the backflow of blood to the lower limbs, causing a series of symptoms such as soreness and swelling of the lower limbs, difficulty in walking, and in severe cases, abnormal sensation of the skin of the lower limbs, ulcers, and so on. If you have varicose veins in your thighs, you need to go to the hospital and let the doctor check whether it is saphenous varicose veins or not, and then let the doctor decide whether you need to do surgery or not according to your situation.