Polyglactin is a domestic foam sclerosing agent. It is through the principle of chemistry, can destroy the endothelium of blood vessels, so that the blood vessels and surrounding tissues form sterile inflammation, through the human body to absorb the sterile inflammation, and eventually will form a fibrous strip, to achieve the purpose of closing the lumen of blood vessels. It is mainly through polyglactin that this drug can act with the inner lining of the blood vessel wall and destroy the inner lining of the blood vessel, because it is a foam, so the drug used will be less and the effect on the human body is less, it can stabilize the concentration of the drug, increase the contact area with the blood vessel wall and improve the efficacy of the action. It is mainly used in the treatment of varicose veins.