Veins return blood from the rest of the system to the center. To return blood to the guts, the veins while in the legs must operate versus gravity. Weakened valves, also referred to as incompetent valves, within the veins may trigger varicose veins. Mayo Clinic functions with countless insurance plan https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-answers-to-your-most-common-questions/