Sclerotherapy: Sclerotherapy includes injecting a chemical Answer (often called a sclerosant) into the faulty veins through a needle or catheter to induce their closure. It's not as productive for veins much larger than 5mm in diameter which is predominantly utilised to deal with the lesser more tortuous veins which can https://www.sgvascularctr.com/what-are-some-common-vein-treatments/