Does a csection change the thickness of your tummy?

From day 1 after my csection, i felt gas movements. They were so strong i watched my belly move up and down even more than it moved with my baby.

It reduced over time but 2 years post partum, i still feel gas move through ny body. And i can even visually see it sometimes.

Does this indicated my skin is thinner or do i have a hernia?

How do i solve this? Thank you.