For people with fair or thin skin, these veins often appear more prominently. That’s because there’s simply less tissue covering them. As we age, our skin naturally thins, which makes these veins even more noticeable — a common occurrence in older adults. But prominent blue veins aren’t limited to age. If you’re very lean or spend a lot of time in the gym, you’ve probably seen your veins “pop” after a good workout. That’s because increased muscle activity pushes veins closer to the skin, giving them that bulging look.

Athletes, weightlifters, and even pregnant women often experience this due to increased