I have dilated veins all the time. how do i make them less prominent?

Depends on veins.: There are many types of veins-spider veins, blue veins and varicose veins. Spider and blue veins can be camouflaged by a sun tan (either natural or spray)-but i would not recommend sun tanning. Varicose veins cannot be concealed unless covered by pants or a dress. The best way to make veins less obvious is to see a vein specialist and have them treated appropriately.