This is also a good opportunity to discuss important travel health issues including safe food and water, accidents, sun exposure and insect bites. Many of the problems experienced by travellers cannot be prevented by vaccinations and other preventive measures need to be taken.
Age and genetics. As you get older, the veins in your hands may become more visible. Additionally, some peopleâs veins are naturally more visible. This could be due to skin pigmentation, body fat distribution, or a variety of other genetic factors. In most cases visible veins in hands are not a sign of a medical condition, or of any other problems.
1 The veins tend to enlarge and it is more difficult for the vein valves to work properly. This is also the reason why your hand veins become more prominent during those summer days.  Vascular disease â in some cases, bulging hand veins are caused by a vascular disease.