I don't get swelling, but I definitely have pain. In the mornings, I have stiffness. It's worst in my fingers and wrists, followed by my lower back, and then sometimes upper back, knees, and ankles.
My GI thought it must have been a reaction to Remicade, but according to blood tests it's not. I went to a rheumatologist and she said it sounded like inflammation but she didn't think it was UC-related since it began while I was in remission. But I'm going to blame UC anyway--it's after I got it that a cascade of health problems began!
I've found that a wrist brace helps--you may want to try that. I also use a heating pad on my back.