He is only slightly puffy around his surgery wound, but its only air under the skin.
I massaged his crop, it feels soft and squishy but sorta like a slightly inflated balloon.
I would say possibly shock, but if you found air under the skin, released that and he started breathing normal for a bit. I would agree with @MysteryChicken it sounds like a ruptured air sac.I poked a hole in the skin where it was collecting air, he started breathing normal and even started chirping again. As soon as i sat his up, he started gasping again.
Hopefully it will seal and heal without any more problems.