Veins return blood from the rest of the system to the guts. To return blood to the heart, the veins while in the legs must work towards gravity. Weakened valves, also known as incompetent valves, inside the veins may induce varicose veins. Deep vein thrombosis boosts the danger of a https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-answers-to-your-most-common-questions/