Varicose (VAR-i-kos) veins are swollen, twisted veins that you can see just under the surface of the skin. These veins usually occur in the legs, but they also can form in other parts of the body.
Varicose veins are a common condition. They usually cause few signs and symptoms. Sometimes varicose veins cause mild to moderate pain, blood clots, skin ulcers (sores), or other problems.
Overview
Veins are blood vessels that carry blood from your body’s tissues to your heart. Your heart pumps the blood to your lungs to pick up oxygen. The oxygen-rich blood then is pumped to your body through blood vessels called arteries.
From your arteries, the blood flows through tiny blood vessels called capillaries, where it gives up its oxygen to the body’s tissues. Your blood then returns to your heart through your veins to pick up more oxygen. For more information about blood flow, go to the Health Topics How the Heart Works article.
Veins have one-way valves that help keep blood flowing toward your heart. If the valves are weak or damaged, blood can back up and pool in your veins. This causes the veins to swell, which can lead to varicose veins.
Many factors can raise your risk for varicose veins. Examples of these factors include family history, older age, gender, pregnancy, overweight or obesity, lack of movement, and leg trauma.
Varicose veins are treated with lifestyle changes and medical procedures. The goals of treatment are to relieve symptoms, prevent complications, and improve appearance.
Read more at National Heart, Lung, and Blood Institute
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2019