Varicose and spider veins are prevalent conditions in the world that have affected millions of people. While both involve visible veins, they vary in their appearance and scale. Varicose veins are large, raised, and typically twisted veins that are typically found in the legs. They can be colored and even feel uncomfortable or heavy because they are blue or dark purple in color. Spider veins, on the other hand, are smaller, red- or blue-colored vessels that are closer to the surface of the skin and may look like a web or branches of a tree.