UPDATE: I just heard from Steve-O. This is what he had to say:
"A physical therapist has told me that nerves are being pinched in my back, and it is in spasms because of inflammation related to torn muscles. I'm doing everything I can to let it heal—icing it, taking Advil, drinking water, visiting a chiropractor and continuing to be worked on by the physical therapist. I'm still rehearsing every day, but walking through my salsa routine rather than practicing the physical stunts and tricks that are incorporated into it. It is going to be a risky routine that I hope to pull off."
If there's one contestant on Dancing With the Stars who can fancy-footwork his way through the pain, it's Jackass jokester Steve-O.
However, his pro partner, Lacey Schwimmer, tells me that Steve-O, 34, is off to see a fourth specialist today regarding a painful back injury believed to be related to their recent salsa rehearsals.
"They all say he has pulled a lot of sciatic nerves and that's pretty bad," Schwimmer says. "Everyone who has looked at him has said that it's not good. He's in pain."
Even so, Schwimmer says Steve-O is committed to staying in the show...