We might not offer abundant thought to our leg veins or the chance factors of unhealthy veins on a usual. However, they serve an important perform among the body, that is returning blood from the lower extremities to the heart. When this method of the vascular system is noncontinuous by weakened vein walls or broken valves, blood will flow backward, pool within the legs and lower extremities, and create varicose veins. What area unit the Causes of Varicose Veins? Age Vein