The elusive bicep vein
 

Okay, maybe only elusive for me. I weigh 155 lbs. I can bench 280. I am pretty lean as well. I have huge veins in my forearms, shoulders, chest, and calves. Yet, I have absolutely no veins in my biceps. It's really not from lack of training, since I work out my arms just as much as anything else. Was I literally just not born with the vein altogether? It doesn't really bother me much, but I was just wondering. What's the deal?

It's there; you're just not lean enough for it to show through.

Are you being honest in your self-assessment? HUGE veins in many other body parts? That's quite the description.

If that is the case, and you still aren't getting the bicep vein, then it's your genetics (in terms of where you get lean first, not where your vein is, just want to be clear)

But, I'd bet on what Cory stated, you just need to get leaner.

ya. everyone has a vein there. but it is just how lean you are and depending on the size of the vein as to how much it will show.

Aaah, the much desired cephalic vein aka biceps vein. Yes, everyone should have a cephalic vein, so don't worry about that :P

1. Now first make sure you're indeed lean enough. You have a well defined sixpack? Then you're percentage of bodyfat should be low enough for the cephalic vein to show through.
2. Make sure your biceps is huge! My right biceps is slightly larger than my left, supprisingly my right cephalic vein is more prominent than my left. Conclusion: the biceps muscle may act like some sort of pump making the cephalic vein appear larger.
3. Genetics. Sadly, some things we can't change (yet).