Sclerotherapy is a procedure where a fluid called a sclerosant is injected into small dilated veins, such as varicose veins, telangiectasias and spider veins. The sclerosant causes these veins to shrink and collapse. Sclerotherapy is used in conjunction with laser vein therapy to treat a wide range of symptomatic or unsightly superficial veins. Advances in sclerosants and techniques have made this procedure more effective and with fewer side effects. The gentle nature of today’s sclerosants has also eliminated much of the discomfort that past generations of patients endured. Sclerotherapy is generally an out of pocket expense, but certain indications (such as bleeding) may be covered by insurance.