Sclerotherapy is a method of treating small vein branches and capillaries with special drugs (sclerosants) that close the damaged blood vessel and thus eliminate it. This treatment method is one of the most popular for removing small blood vessels in the legs or other areas of the body. Sclerotherapy can be used as an initial method of treating varicose veins. It is important to realize that varicose veins are not just a cosmetic defect. A network of veins and capillaries that have dotted the legs can after a while cause more serious health problems, such as ulcers, thrombosis. Sclerotherapy is most effective when varicose veins are just starting to develop, small capillaries appear on the legs.