The appearance of hard lumps after varicose vein surgery has something to do with the way the procedure is done. Because of the traditional high saphenous vein ligation and stripping surgery, there will be a certain amount of blood seepage in the vascular bed, and if there is more blood seepage, a blood clot will be formed. A hard mass can be seen on the surface of the body, with tenderness and high skin temperature, which are the signs of superficial phlebitis, but it will disappear gradually over a period of time. If the clot disappears, the use of topical Xylitol or oral dioxymethamphetamine or veritaserum will help to shorten the absorption time of the clot. In the case of sclerotherapy, the presence of a hard lump in a varicose vein is due to the presence of a thrombus in the injected vein, because the pressure of the blood is high, the compression during the injection is not timely, and the blood backs up and enters the varicose vein, resulting in the presence of a thrombus in the superficial vein, which is absorbed by the vein itself. This superficial vein thrombosis is self-absorbed and takes a long time to disappear, about one month. In the process of disappearance, there will be skin pigmentation, and when it disappears completely, the skin pigmentation will also improve slowly without leaving any after-effects.