Have slight pain when i rub over vein on forearm?

Vein: If the vein itself is hardened, reddened and definitely tender, a superficial phlebitis would be suspected. Your symptoms are more vague and at this time I would observe for more obvious abnormalities. If you still have concerns, see your physician for evaluation.

Probably nothing.. : It depends .. is it red , swollen , rash? or vein is very big and tender. Normaly veins on hands ste more prominet and some may be litzle tender especialy if you keep rubing or puring pressure . Id any doubt ... see your Doctor. Ok to put cool compress .