Dr. Robert F. Hanna featured on azcentral.com

Varicose and spider veins often occur when the valves in the veins do not function properly. Because veins return blood from the feet back to the heart, they contain valves within them which help blood to return to the heart and not fall back toward the feet from gravity. When the valves stop working, the blood then backs up, collects in the legs and feet, and the veins containing that blood start to enlarge…

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