Has anyone seen this? Should I be concerned?

My daughters belly button seemed to ‘pop out’. It shows like picture #2 when she’s pushing to poop. But picture #1 is how it is normally.

It just started a few weeks ago, right after her check up. The only reason I even noticed that it looks different than before is the ‘brown’ spot, that was never there.

I’m guessing it’s a small umbilical hernia (if it’s anything at all). It doesn’t bother her and it doesn’t feel any different than it did before it ‘popped’ out.

I haven’t felt it is anything to worry about. So I will mention it at her next appt next week.

Just wondering if anyone’s seen anything like this.