Hodaya is right. They are very hard to detect, since they can be so tiny, yet cause so much trouble!
The one thing that seemed to help mine for a while was Remicade. But, my body developed antibodies against it after a few years, and it stopped working. Once that happened, the Crohn's flared up with a vengeance and the r/v fistula came back, causing an abscess on my butt cheek.
That was the start of my many surgeries, first to drain the abscess, then to get a temporary ileostomy, and then to have my colon, rectum, and anus removed (proctocolectomy). In hindsight, it was the best thing that could have happened, because now I'm completely healthy.
Christine, I'm so sorry you're continuing to have drainage. Would you be
open to having your anus removed? I think it would solve your problems down there.
Dx'd Crohn's in '99 at age 28. Proctocolectomy and permanent ileostomy in '06.
Disease-free and medicine-free since surgery and very thankful to be healthy again.