Weak or weakened valves can cause varicose veins. Arteries carry blood from the guts to the rest of the overall body. Veins return blood from the remainder of the body to the guts. To return blood to the heart, the veins from the legs should do the job in opposition https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-from-the-perspective-of-a-vascular-surgeon/