What condition is characterized by abnormally swollen and twisted veins, particularly in the legs?

Varicose veins are characterized by abnormally swollen and twisted veins, primarily occurring in the legs. This condition arises when the valves within the veins that help blood flow back to the heart become weakened or damaged. As a result, blood can pool in the veins, leading to their enlargement and creating the characteristic bulging appearance.

The risk factors for developing varicose veins include prolonged standing, being overweight, hormonal changes, and a family history of vein problems. While other conditions like arteriosclerosis, deep vein thrombosis, and peripheral vascular disease impact blood flow and vein health, they have distinct characteristics and underlying causes that do not specifically involve the swelling and twisting of veins in the manner seen with varicose veins.