heart and blood vessel disorders
Spider Veins
Introduction
Spider veins are small, enlarged veins that are visible under the skin. (See also Overview of the Venous System .) Spider veins (also called telangiectasia) are small veins that become enlarged and are visible under the skin. Photo courtesy of Robert S. Porter, MD. Spider veins (also called telangiectasia) are small veins that become enlarged and are visible under the skin. © Springer Science+Business Media Many people have spider veins, which are enlarged capillaries. Capillaries are tiny, extremely thin-walled vessels that act as a bridge between arteries (which carry blood away from the heart) and Overview of the Venous System (which carry blood back to the heart). Spider veins in the legs may be caused by the pressure from blood in Varicose Veins , but people without varicose veins may also have spider veins. When people without varicose veins have spider veins, the cause is usually thought to be hormonal factors that are not yet understood. A hormonal cause would explain why spider veins most commonly occur in women, particularly during pregnancy. Spider veins usually do not cause symptoms, but some people may have pain or burning. Doctors recognize spider veins by their appearance. Tests are not needed. 