I don't know of a cream but I'd LOVE to hear about one if you learn of it.
I do know that you can get little injections that push the trapped blood out of the vein and it becomes no longer visible. I had this done once. It stung a bit but it worked. I can't even remember what I paid for it! It was about 9 years ago. I have recently noticed some more that have developed and want to do something about it. Just a few but I hate them! lol