@mendax: in my case I can feel them as well, so it's not just skin colour.
@krellin: I meant the symptom Coprolalia, to be clear. Not like it matters. My point was that, like you, I'm quite different IRL. As a rule, I don't worry. Things happen or they don't.
The human beings I am close to tend to not have visible veins. I can't think of anyone around my age who does, and the only real example that comes to mind is an old sick man, so that's not exactly a reason to assume it's normal/healthy either.
So that's why I noticed it. Not worried at all, but I noticed it. Some time later I posted on webdip. I didn't google yet. Why not, you might ask? Because posting it on webdip gives me the best 'experience', and because I can always google answers, but on webdip I have to wait, so I consider it more efficient to first post here and google after that to have an increased chance at finding a quick solution.
Webdip's answers are often quite unique as well, and since I always try to look at things from new/unique perspectives, that's useful to me. In general, it just works better for me to post here. With the mute options, it can't really harm you if you don't want it to so there's no point worrying about that.
And it's quite fun that you managed to not answer my question after all, posting an irrelevant link to show me how easy it is to find something, at which you clearly failed.
And indeed, this isn't a matter of aging as mendax pointed out, and I don't smoke :)