A vein is a blood vessel that carries blood low in oxygen content from the body to the lungs and heart. It is a normal part of the circulatory system. Thousands of people every year consider getting treatment for varicose veins and spider veins. Advertisements for treating venous disease often tout "unique," "permanent," "painless," or "absolutely safe" methods - making it difficult to decide on the best treatment. If you are considering this procedure, the following information may help.

What are varicose veins?

Veins can become enlarged with pools of blood when they fail to circulate the blood properly. These visible and bulging veins, called varicose veins, are often associated with symptoms such as tired, heavy, or aching limbs. In severe cases, varicose veins can rupture, or open sores (called "ulcers") can form on the skin. Varicose veins are most common in the legs and thighs.

What are spider veins?

Small "spider veins" also can appear on the skin's surface. These may look like short, fine lines, "starburst" clusters, or a web-like maze. Spider veins are most common in the thighs, ankles, and feet. They may also appear on the face.

Who gets varicose and spider veins?

Varicose and spider veins can occur in men or women of any age, but most frequently affect women of childbearing years and older. Family history of the problem and aging increase one's tendency to develop varicose and spider veins.

What causes varicose and spider veins?

The causes of varicose and spider veins are not entirely understood. In some instances, the absence or weakness of valves in the veins, which prevent the backward flow of blood away from the heart, may cause the poor circulation. In other cases, weaknesses in the vein walls may cause the pooling of the blood. Less commonly, varicose veins are caused by such diseases as phlebitis (inflammation of the veins) or congenital abnormalities of the veins. Venous disease is generally progressive.

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