Veins return blood from the remainder of the entire body to the heart. To return blood to the guts, the veins in the legs should do the job from gravity. Weakened valves, also called incompetent valves, within the veins might lead to varicose veins. Deep vein thrombosis raises the danger https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-answers-to-your-most-common-questions/