Causes of Varicose Veins
The most common cause for varicose veins is the damaged or weak valves of the arteries that carry blood from the legs to the heart working against gravity that return blood to the heart. The muscles of the lower legs tighten to pump, aided by vein walls and valves that prevent backward blood flow, causing congestion in the veins, which can lead to stretching or torsion if they become weak or damaged.