Veins return blood from the rest of the human body to the heart. To return blood to the guts, the veins inside the legs must get the job done versus gravity. Weakened valves, also known as incompetent valves, throughout the veins could bring about varicose veins. النزيف. في حالات نادرة، https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-answers-to-your-most-common-questions/