If your hand veins stand out despite being young, there are natural reasons for it. Slimmer hands have less fat cushioning, making veins show up more. Genetics and skin type also play major roles; thin or light skin reveals veins easier, showing bluish or purplish hues.
Physical activity pumps blood and may make veins swell temporarily. Over time, frequent exercise and muscle growth can make veins permanently visible. Hot weather and hormonal changes are additional factors making veins pop.
Most cases are harmless, but if veins swell, bleed, or hurt, see a doctor. To reduce their appearance, keep hydrated, moisturise with creams containing hyaluronic acid, wear loose clothing, and consider professional treatments like sclerotherapy.