I'm sorry you're having trouble with this. I had similar problems when I was having abscess/fistula problems, but it only happens occasionally now that those are cleared up. The best trick I ever had to alleviate the inconvenience and ickyness was to wear just 4x4" guaze pads between my cheeks. Most medical supply places and some pharmacies sell them in bulk, so they can end up being WAY cheaper than some other options.
I guess your doctor thinks that if the inflammation is under control this wouldn't be happening? I wish I had a good answer for you... I just know that mine gets better when my gut is better...
Stress to your doc that this is a quality of life issue for you and that he needs to give you some answers.
27f, dx'd CD July '05 after 6 fistula/abscess surgeries
(miscarried at 13 weeks, now waiting to heal before trying again)
Stopped Humira August 22nd, 2008.
Went Gluten-Free, noticing some definite improvement.
Started LDN October 27th, and already LOVING IT.
"Our greatest fear is not that we are inadequate, but that we are powerful beyond measure."