It is used to treat some types of arthritis. It is used to treat Crohn's disease. It is used to treat ankylosing spondylitis. It is used to treat plaque psoriasis. It is used to treat ulcerative colitis. It is used to treat a skin problem called hidradenitis suppurativa. It is used to treat uveitis. It may be given to you for other reasons. Talk with the doctor.