Visible veins in hands are a common occurrence and can be attributed to various factors. Here are some of the reasons why veins may be more visible in hands at a young age:

• Low body fat: People who are very fit and young may have visible hand veins due to a lower percentage of fat in the body.

• Genetics: If you have immediate family members with bulging veins, there’s a chance you’ll have them too.

• Hot weather: High temperatures can make it more difficult for your vein valves to work correctly, which can enlarge your veins.

• Age: As you grow old, the hand veins become more prominent. Thinner, less elastic skin is less able to hide the veins underneath the skin.

• Exercise: When you exercise, your blood pressure rises, and your veins are pushed closer to your skin. Once your blood pressure drops to normal, your hand veins become less prominent. However, exercising on a regular basis, especially strength training exercises, can make bulging hand veins permanent.

Visible hand veins are rarely a sign of a severe disorder, but it is best to consult a doctor to know more about what you are going through. It could be a sign of vascular diseases such as deep vein thrombosis (DVT) that obstructs the blood flow and increases the risk of strokes and heart attacks, and getting it checked can prevent further problems.