Venous insufficiency is a condition where the flow of blood in the veins is inadequate, which causes blood to pool in the legs. In these states valve in the veins don’t work and venous blood refluxes backward down the veins into an already congested leg. Chronic venous insufficiency is a long-term condition. It is commonly due to malfunctioning (incompetent) valves in the veins. It may also result from the blood clot in the veins. Usually it is treated by compression stockings, exercise and weight loss, but in some cases require vein ablation or vein stripping.