The weakened valves Permit blood pool within the veins in lieu of touring to the center. When blood swimming pools during the veins, the veins develop into more substantial, making them clearly show beneath the skin. A blood clot, also known as thrombosis. A blood clot inside the portal vein https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-from-the-perspective-of-a-vascular-surgeon/