Hi,
welcome to the Crohn's Community Forum.
I have had Crohn's for 40 yrs, dx when I was 24 yrs old. Cortisone IS used to treat Crohn's, but now only for short periods, say 3-4 months, because of the side effects of long term use. If the Crohn's is in the terminal ileum area and/or first part of the colon, a newer steroid, Entocort can be used, which does not have the debilitating, and embarrassing, side effects that prednisolone and prednisone do.