Veins return blood from the rest of the system to the heart. To return blood to the heart, the veins from the legs ought to do the job from gravity. Weakened valves, also called incompetent valves, inside the veins could possibly bring about varicose veins. إذا كنت قلقًا بشأن شكل https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-answers-to-your-most-common-questions/