How can I strengthen my veins?

I was recently at the doctors, needed a blood test, the doctor was a bit dodgy and kept missing my vein, so he had to go in my hand,-at the back of my wrist to be most precise. he got a vein in my hand, but even since then i have had wrist pain and a...

Okay so one day as I'm walking around, I look down and see these veins on the side on my left foot that really bulge when I walk. My mom said they were either spider veins or varicose veins. I usually like to walk a lot around the apartment and I've...

I be we have all noticed a lot of different peoples' bodies emphasize different veins. For example: "Why does that person have a vein branching out of that vein on their neck? I don't have it." So what do veins say about a person. What would...

Would prolonged laxative use cause my veins to become more narrow? A couple months ago when I tried to donate blood, I was turned away because my veins were too small to draw blood without causing major bruising. They said that not drinking enough water...

I'm 22 now but ever since high school I've noticed that the veins on my body, especially my penis, have become much more prominent. I work out regularly so the increased size of the veins on my torso and arms may be because of that but the veins on my...