What Exactly Are Varicose Veins? Varicose veins are enlarged, twisted veins—most often in the legs—caused by weakened vein walls and malfunctioning valves. When blood can’t flow efficiently upward ...

Varicose veins are swollen, twisted veins caused by weakened valves that allow blood to pool. While often a cosmetic issue, they can pose health risks like blood clots and skin ulcers. Self-care ...