What is sclerotherapy?
Sclerotherapy involves using a very small needle to inject a medication called sclerosant directly into the vein. For larger veins that are below the surface of the leg, the physician will use ultrasound to visualize the veins to be treated and guide injections. Smaller veins on the very surface of the leg will be treated by the nurse or physician without the use of ultrasound. The sclerosant causes the lining of the vein to swell until the vessel is sealed shut. These collapsed veins will then be dissolved and reabsorbed by the body.