Vein Valve

Inside our veins, these delicate flaps of tissue function like double doors which open to let blood flow up the leg and abruptly close to stop downward (or backward) flow. When vein valves fail, venous reflux develops, and varicose veins appear.

Normal Valves

In normal veins blood flows up the leg, assisted by vein valves.

Abnormal Valves
In abnormal varicose veins there is downward blood flow which is called venous reflux. This reflux creates congestion of blood inside the veins and is what causes the aching, itching, heaviness, and swelling associated with varicose veins.