Varicose veins can be reduced by a treatment called endovenous laser varicose vein surgery. Swollen, protruding veins known as varicose veins frequently appear on the thighs or calves. A laser is a machine that emits a tiny beam of radiation that resembles light.

It is a treatment for varicose veins in which an optical fiber is inserted into the vein to be treated, and laser light, normally in the infrared portion of the spectrum, and is shone into the interior of the vein. This causes the vein to contract, and the optical fiber is slowly withdrawn.