There are times, though not constantly, that the veins on my hands are huge! It's not a stressed out thing or extremely hot temps necessarily when I notice it. I have noticed this on older folks, but I'm only 56. I do have borderline high blood pressure & not on any meds. It seems to be more on my left hand than my right, but definetly on both. They are so large I can see where they lead to my fingers & down my wrist. They actually cast a shadow in the right light. It's interesting to see how each hand's veins connect differently on each hand. I can't wait to hear the consensus on this one. LOL Thanks!