Sclerotherapy is an injection treatment used to improve the appearance of unsightly leg veins. This procedure can be used for small spider veins, larger blue/green reticular veins, or bulging varicose veins. At The Pearl Dermatology we use Asclera (polidocanol), a sclerosing agent that is turned into a foam and then injected into reticular veins to treat the root of the problem. Often the larger veins are the cause of spider vein formation. In order to get the best result from sclerotherapy, most patients require a series of treatments with anywhere from three to six treatments.