I've had this rash for awhile now, nothing seems to work with it, and undiagnosed. I see a dermatologist and had an allergic patch test done, with negative results. I can post a picture of it. I've been taking dipentum for years (over 10) for crohn's disease which is in remission, never had a rash with it, this has come on over the last 4-5 months. I put a steroidal cream on it after showers. Sometimes it flares up and sometimes it is minimal.. I've been told to stay off all vitamins for 1 month or so and it may have to be biopsied.. It hasn't spread much. Any ideas about this? I'm over 50.