I know many people don't agree but I think the younger the better (if you want to do them). I had my girls done at 9 and 6 weeks. They both healed fine and have had no issues at all. Both didn't even notice that they were in and they never got infected or red (after the first redness subsided). My 4 year old loves hers but doesn't play with them as they have always been there iykwim?

You can also use emla cream to numb if you want to. Also both my girls cried for less than a minute after it was done.