Veins return blood from the remainder of the overall body to the center. To return blood to the heart, the veins inside the legs must function against gravity. Weakened valves, also known as incompetent valves, in the veins may possibly cause varicose veins. تساهم التبرّعات، وهي قابلة للخصم الضريبي، في https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-answers-to-your-most-common-questions/