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Risk factors
Risk factor no. 1 is one's age: Studies have shown that severe vein disorders are found seven times more frequently in sixty year-olds than in twenty year-olds. Other risks of accelerating or even engendering a vein disorder are obesity, lack of exercise, general hormonal influences in the case of women and hormonal changes and mechanical hindrances to venous blood flow in pregnancy. The frequently cited genetic inheritance of a connective tissue insufficiency as a cause of the development of varicose veins has not been definitely proven.
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