For me, this is the worse than the pain. My scoliosis makes it so hard to get comfortable EVER. Don’t get me wrong, it was worse before I had surgery as I had a large rib hump which meant I found it uncomfortable leaning against pretty much any chair.
After surgery, it’s different but it’s still hard to get comfortable. I still find it uncomfortable leaning against most chairs as I still have a slight unevenness to my ribs. I also have a protruding shoulder blade and screws that stick out of my back. All this makes it painful/uncomfortable to sit on most chairs without a cushion.
In addition to this, as my back is now fused “straight” I can’t mould my back to fit to any seat/chair. I sit poker straight which means it can be uncomfortable when I’m in a car or on public transport. I don’t mind this, I’d rather this than the alternative (have my scoliosis getting worse) but I can’t really remember a time that I was truly comfortable.