The final shape of the belly button depends on how that scar is formed. There is actually an ideal belly button shape. Props to you made it through this post without looking at your belly button. Are you an innie or an outtie? The Ideal Belly Button. When women are pregnant, it's possible that if they have an innie, it can pop out to an outie.
Chiming in with the others who said umbilical hernia. In the grand scheme of things, the repair will be much less involved than your gall bladder. I am holding way too many hostages. I relaxed and it went back in and I was ok.
If you think about it, it's most likely the largest scar on your body. Okay, so what's the differences? After the umbilical cord is cut, it dries up and falls off, leaving the belly button in its place. Out of those people a couple thousand get their belly button touched up. There's actually belly button surgery. The cord contains arteries and veins, and when the cord is cut it closes up. When people get tummy tucks, it can change the shape of the belly button.