What Causes Varicose Veins?

What Causes Varicose Veins and Spider Veins?   Venous insufficiency is the medical term for the disorder that includes varicose and spider veins.   Varicose veins are dilated, cyanotic veins that protrude from the dermis and signify poor health. Valves, which act as tiny unidirectional gateways, are spread throughout the veins of the legs and prevent […]