Hello! I’m writing a story with a character that does BDSM. At one point, he’s in a bad car accident and breaks his left arm and leg. Once he’s healed, I imagine there’d be residual issues that might make certain activities more difficult (like being on hi

That’s a really interesting question! I’ve never been in this situation myself IRL, so I would actually suggest that the best course of action might be to do some research on BDSM + disability to read some first-hand accounts. 

BDSM is all about creativity, so the characters would just need to think outside the box a little - finding modified positions that don’t cause pain would be a big one. It might also help for them to shift more emphasis onto psychological forms of control rather than control via physical restraint. I think it would be super-interesting to read about characters learning to explore the more cerebral aspects of BDSM after experiencing new physical limitations.

Again, primary sources are going to be your friend here! There are sure to be plenty of people who deal with similar situations on a regular basis and have shared their experiences online.