Bumps in vein on arm: My doctor said it's valves in the vein - is there a such thing? (Photos)

These are normal valves in veins.  The veins in the picture are superficial veins with prominent and noticeable valves in them in the pictures

Those are valves or venulectasia, where the vein is 50% larger than segments before or after the valve. This is normal.H Karamanoukian MD FACScertified vein specialist (ABVLM) and double board certified surgeon