Post partum belly 'dent'?

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Weird question lol so I had my son 2 years ago and I now have a huge dent above my belly button. It's much more noticeable and deep in person, the pictures don't show it as well. Anyone else have this? My belly button is a wreck too but that isn't a surprise to me. I was 113 pounds pre pregnancy and I'm 125 now, I've gained some depression weight I'm embarrassed about but I'm not sure if that would cause this. I'm just curious if anyone else has this or knows what caused it?