Serious venous insufficiency (CVI): A problem that happens when the venous wall and/or valves in the leg veins are not Performing effectively, rendering it complicated for blood to return in your heart from your legs. Varicose veins are swollen and enlarged veins. These are commonest while in the legs but https://www.sgvascularctr.com/exploring-vascular-malformations-informative-guide-for-singaporeans/