According to Albuquerque Vein and Laser Institute, the blue color of veins concerns how our eyes process light. Red ...

The effect is amplified even more by an optical illusion. Skin around the vein looks more red than the vein itself. So, the color contrast enhances the veins' bluish hue. More from Video ...

Spider veins, a milder type of varicose veins, are smaller than varicose veins and often look like a sunburst or "spider web." They are red or blue in color and are commonly found on the face and legs ...