Varicose veins affecting the legs of an 81-year-old woman. Varicose veins are veins that have become twisted, distended, and lengthened, due to the pr

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Varicose veins affecting the legs of an 81-year-old woman. Varicose veins are veins that have become twisted, distended, and lengthened, due to the presence of defective blood valves. These valves prevent the blood, which should move upwards, from sinking to the feet. Defective valves allow accumulation of blood, causing this knobbly appearance. Leg veins are most commonly affected. Treatment includes the stripping (the surgical removal) of the veins, or sclerotherapy, the injection of the veins with an irritant that eventually blocks them, causing the re-routing of the blood.

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Photo credit: © DR P. MARAZZI/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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