I have very bad pain in my lower back on the right hand side into my buttock. I also have bad pain in my back of my neck. The orthopedic surgeon told me it is from sitting a lot that causes pain in my back .
If you have Crohn’s, then it is worth a trip to a rheumatologist to see if your back pain is related to the Crohn’s. Patients with Crohn’s can have inflammation in the spine.