Congenital causes are malformations with your leg veins that you’re born with. One example is, many people are born without the need of valves inside their leg veins. Workup of sufferers suspected of having Serious venous insufficiency or obstruction consists of an ultrasound (imaging of your veins working with audio https://lukasnvchm.life-wiki.com/1487614/vein_disease_singapore_an_overview