Genetics can influence the size and location of superficial veins, as well as skin thickness and the amount of tissue beneath the skin.
That’s why prominent veins alone are generally not enough to indicate that something is medically wrong.
You may simply have naturally visible veins.
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In fact, some people have had prominent veins on their hands since childhood and only become concerned when they compare themselves with someone else.
There is no single “normal” appearance for healthy hands.
Exercise Can Make Your Veins Stand Out
One of the most common reasons veins become temporarily more noticeable is physical activity.
During exercise, your cardiovascular system works harder to deliver oxygen and nutrients to active muscles and remove metabolic waste.
Blood flow increases, and changes in the diameter of blood vessels can make superficial veins more prominent.
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This can be especially noticeable during activities such as:
