Leeches are medicines in traditional Chinese medicine that activate blood circulation and remove blood stasis and break blood, and it has a relatively strong power to activate blood circulation and remove blood stasis, which is its main function. Varicose veins are caused by venous valvular insufficiency in terms of pathological mechanism, which is caused by poor closure of the valves of the saphenous femoral vein. Generally, venous blood flows backward, resulting in increased venous pressure in the lower limbs, which in the long run makes the veins bulge up like blowing up a balloon. Leeches can improve the blood composition so that the blood dilution, have the effect of blood circulation, can only reduce the symptoms of varicose veins, but the varicose veins themselves can not be solved, cryptic femoral vein valve insufficiency, poor closure, this situation can not be solved through the drug in general. Therefore, leeches can only alleviate the symptoms of varicose veins, but cannot cure them.