Varicose Veins Basic Causes And Symptoms
By Tammy Jamison

Blood flows through your vascular system as it makes its way toward your heart. It is then pumped to your lungs in order to capture oxygen. Once filled with oxygen, your blood travels throughout your body through arteries. It goes through capillaries and releases the oxygen to your tissues. Then, it travels back to your heart again. Along the way, valves ensure the proper direction of the flow. If those valves fail to work, the flow backs up and the pressure causes your veins to swell.

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