C. S. Lewis said God used pain to get our attention because we cannot ignore it.

I winced while reading this. Imagining what it would have been like was hurting enough... Luckily there's Nat by his side. Thank the gods!

This is something I've legitimately pondered time and again, how it would be for Steve to undergo surgery.
Even if they tried drugging him up, it would either not phase him at all (hell, the guy fiwbed a whole bottle of vodka without a twitch), or maybe fuzz him up. He would wake confused and hurting, not understanding what was going on, or just have to grit through the pain of his body being sliced and picked apart, and then seen back together. And stitches hurt like mad dog, even numbed.
That would be a living hell until he finally passed out when it got to be too much for web his super enhanced body.
You did this so well, I was stuck between tears and a sick stomach, just imagining that awful pain. Plus he's had enough crap going in his mind, he'd have a time even if he hadn't been stressed out.
Capitol job.

Poor Cap! What a horrible thing to not be able to have help from pain relievers!

Natasha did a wonderful thing for him here.

Well done. :)

Poor Steve. Someone really needs to work out some anesthetic for him. Good story, solid and interesting.