For many people, spider veins are a natural part of the aging process. Over time, the valves in the veins that prevent blood from flowing backwards weaken, permitting blood to pool. The pooled blood enlarges veins and makes them more visible, creating the skinny, blue squiggles that we call spider veins. Though spider veins cannot always be entirely prevented, their appearance can be delayed by practicing good habits.
Changing positions throughout the day, avoiding positions that impede circulation (crossed legs, for example), wearing compression stockings and using sunscreen are all habits that can help reduce or delay the appearance of spider veins. Additionally, maintaining a healthy body weight, eating more fiber and less salt, and exercising regularly can also keep spider veins at bay.