A large portion of people with IBD end up with arthritis and other skin disorders. It's probable that the joint pain is associated with chrons (or at least some of it).
I'm going to elaborate a bit. Peripheral arthritis is common with chrons. The damage typically isn't as bad as RA. There is research suggesting a correlation between improvement of Chrons and peripheral arthritis. However, I can't find anything research on axial symptoms.
I'm going to elaborate a bit. Peripheral arthritis is common with chrons. The damage typically isn't as bad as RA. There is research suggesting a correlation between improvement of Chrons and peripheral arthritis. However, I can't find anything research on axial symptoms.