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In Your 20s

Varicose veins can be hereditary, but sitting still for hours can inhibit blood flow in legs, contributing to the formation of swollen vessels. So move around once every hour or two, and when you get home, prop up those limbs. Run an exfoliating dry brush like Earth Therapeutics Body Brush ($10) over them for 10 minutes to help stimulate circulation and prevent blood from pooling, which may enlarge veins, says NYC dermatologist Jeannette Graf. Apply SPF like Neutrogena’s Ultra Sheer Stick ($10) daily to block the UVs that cause skin to thin, making veins more visible.