Swollen, enlarged veins that are blue or dark purple in hue are known as varicose veins, often known as spider veins. They most commonly occur when faulty valves cause blood to pool in the vein or flow in the wrong direction. These veins typically appear on the legs and feet when there is a malfunction in the veins that impairs blood flow. Because of the lumpy vein look on the skin, varicose veins are largely a cosmetic issue for most people. However, these can cause pain and discomfort in some people, which can lead to more serious problems. We have a staff of highly trained surgeons who specialise in treating and performing varicose vein laser surgery.