Congenital leads to are malformations inside your leg veins that you’re born with. For example, lots of people are born without the need of valves inside their leg veins. Workup of individuals suspected of getting Continual venous insufficiency or obstruction contains an ultrasound (imaging on the veins employing audio waves) https://www.sgvascularctr.com/what-are-some-common-vein-treatments/