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 those bulging, twisted veins that are usually blue or purple. If you think this is not worrisome, varicose veins are more than just a cosmetic issue. They can lead to aching, ...