Varicose veins are swollen, twisted veins that often appear blue or dark purple, commonly found in the legs. They occur when the valves in the veins weaken, causing blood to pool instead of flowing smoothly back to the heart. This can lead to discomfort, aching, or a heavy feeling in the legs. While varicose veins are usually not a serious health issue, they can sometimes lead to complications like blood clots or skin ulcers. Factors such as age, pregnancy, and a family history of varicose veins can increase the risk. Simple lifestyle changes and treatments can help manage the condition.