I’ve had the good fortune to never feel true, real pain in a dream. Whenever something happens that would hurt IRL, I just get this weird, uncomfortable, tingly sensation that a few others in this thread mentioned.
Pain is actually one of my main methods of reality checking. I know it’s cliche, but I actually do pinch myself to see if I’m dreaming. If it hurts, I’m awake. If it doesn’t, it’s time to fly.