B.M.
Hi S.,
My oldest son had an umbilical hernia. He got it when he was just a few weeks old and like the other moms who responded, it eventually went down and the result is an "outie."
I was concerned and consulted several of our friends who are doctors. Most of them said if its still a problem when he is a teenager THEN consider surgery. He's 5 now and its probably been a little outie since he was 2 or 3.
Hope this helps,
B.