Humira - Allergic reaction

My 19 year old daughter started Humira (after 8 years with Crohns and on and off other meds) and after 2 months developed an horrific pustualr psoriasis-like rash over most of her body.  While she has been off Humira for over 2 months and has been treated with prednisone and topical creams for the rash, it still persists.  I have read research literature her dermatologist provided indicating that this is a documented, while rare, allergic reaction to Humira.  She has seen 3 GIs in two different states and not one of them has any experience with this or even HEARD about this possible reaction.  Anybody out there have this reaction, too?? and what was the outcome??? Names of doctors who've actually experienced this with their patients??? We are in California.  thanks, Jean