Chronic venous insuf: Chronic venous insufficiency is due to the back flow of blood in the veins usually in the lower extremities. Back flow is usually protected by valves in the veins that become faulty over time allowing blood to pool. This increases the pressure of blood in the veins and fluid (and a small amount of blood) leaks into the tissues causing swelling, pain, inflammation, and on the skin ulcerations.
Answered 11/8/2014
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