Plus, the top risk factors for developing them.
are incredibly common — especially among adult women — and they are also distinct in appearance: Blue, purple-tinted twists and turns underneath the skin, which usually take shape on the legs. For some people, varicose veins are merely a cosmetic issue . While for others, the presence of these swollen, enlarged veins can bring on a host of painful side effects.
Varicose veins can range in severity from thin, threadlike veins to "deeper vessels called reticular veins which appear as medium-sized bluish veins under the skin," explains, a board-certified dermatologist in Tyler, Texas. "The largest deep connecting varicose veins are not usually visible unless special ultrasound devices are used. " Varicose veins are most commonly found on the lower leg and inner thighs, as well as the shins, calves, and ankles .
To understand what causes veins to become varicosed, it helps to first understand the body's venous system. Our veins, when functioning properly, operate as one-way streets: Moving blood from our peripheries back to the heart. This explains why varicose veins almost always occur on the legs — because when we're standing or sitting, our veins have to work against gravity to do their job. "As gravity pulls everything down, veins tend to accumulate blood and it becomes harder for blood to travel upwards back towards the heart," says, a board-certified dermatologist in Chicago. "As time goes on, this backup of pressure leads to collapse of valves in the veins.
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