Steve just stood by, giving both doctor and patient some room - but he was close enough to grab, if Bucky needed something (someone) to hold onto. He was also close enough to grab Bucky, if he needed it.

He wasn't sure whether watching or not would be better - he knew Bucky didn't like those scars, so after a minute he opted to just keep his eyes on the room, making sure it stayed secure so that the doctor clean and bandage the cuts. Though he did try to catch Bucky's eye, to give him a look that said he wouldn't tell the president, either. Not unless it became absolutely necessary. And he hoped it never came to that.