I’m the one with the j- pouch but my husband has Psoriasis and now he was just diagnosed with Psoriatic arthritis. He recently just started on Skyrizi…. Another new biologic that targets auto-immune diseases. Skyrizi was intended for Chrohns disease with a lot of success. Maybe if Stelara doesn’t work you could look into this one. My husband has noticed an improvement with his Psoriasis and the arthritis.
Good Luck!