I also have Crohn's and Crohn's-related arthritis and am on Humira. I have joints that swell in the winter but I noticed after using my hands a lot last weekend to peel off old caulk and put new down, that my hand that was squeezing the caulk tube swelled up in two different places. I just think it's related to the arthritis, but with all of my problems, who knows?
Crohn's Disease, Acid Reflux/Gastritis, Hashimoto's Thyroiditis, Endometriosis, Arthritis, Depression/Anxiety. Too many meds to list them all. =)