Sclerotherapy: Sclerotherapy involves injecting a chemical Answer (referred to as a sclerosant) in the faulty veins through a needle or catheter to trigger their closure. It's not as successful for veins larger than 5mm in diameter and is predominantly employed to take care of the scaled-down extra tortuous veins which https://www.sgvascularctr.com/what-are-some-common-vein-treatments/