Thread veins are tiny red veins that you can see through the skin, most commonly on the cheeks and nose or scattered on your legs. They are also referred to as spider veins, capillary veins and "broken" veins, which isn't truly accurate because they aren't technically broken, they are dilated. Normally, these tiny veins are invisible, but if they expand enough, they can show through your skin. So what causes thread veins to dilate? The usual suspects: too much sun exposure, pregnancy, estrogen treatments, or your mom, as they may be inherited. More good news: Like all of the other lovely