Weak or ruined valves may lead to varicose veins. Arteries carry blood from the guts to the remainder of the body. Veins return blood from the remainder of the overall body to the heart. To return blood to the center, the veins from the legs ought to work against gravity. https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-from-the-perspective-of-a-vascular-surgeon/