I have FMS and also the IB that many of us have with it. I have had for about 18 years. I am now 46. It comes and goes with nothing that I can track it to. I use Imodium if I have to be somewhere I cannot get to a bathroom right away, but I have no BM for three days if I do that.
I just had my first colonic session Tuesday. I was so sick to my stomach and cramped so bad with each release.(It was no different from when I have an attack on my own.) The second session was Thursday much better she used much cooler water. I really felt great when I got home. My third and last session will be Tuesday.
I am really hoping it will help to rid me of IB.

Expensive but worth a try.