Visible blue veins on your hands are usually normal, especially if you have fair or thin skin. “These veins aren’t just random lines — they’re part of a vast network of superficial veins.” As we age, or if we’re lean or very active, veins can become more noticeable due to thinning skin or increased muscle activity. “Increased muscle activity pushes veins closer to the skin,” which is why athletes and pregnant women often see bulging veins.

However, sometimes prominent veins may signal a health issue. If veins appear thick, twisted, or rope-like, they might be early signs of varicose veins. While usually harmless, they can sometimes cause discomfort. Watch for red, swollen, warm, or painful veins — these could be signs of a blood clot or serious conditions like deep vein thrombosis (DVT) or pulmonary embolism.

To keep veins healthy: stay active, avoid tight clothes, manage weight, take breaks from sitting or standing too long, and quit smoking.

If you’re concerned, “the first and most important step is having a conversation with your doctor.” While often normal, visible veins can sometimes be a subtle warning your body is sending.