heya. i got mine done and it doesn't really hurt!! i was really surprised! so if i were you i would worry bout it!
I don't see why not..it's on your skin..but the piercer will want to sterilize the area first, which may clean off the cream. I'd just do it like everyone else, and be brave. If you can't handle the pain, don't do it at all :)
Your piercer might have some tricks also. May want to ask him/her.Can I put numbing cream on my tongue that I just got pierced?