Does anyone experience lengthy diarrhea? This has been bothering me for months. I went to gastroenterologist and I have nine bottles that I have to fill. So far I have not been able to accomplish this. It's like having to go for urine tests. But now this time, it is poop on demand. Earlier I did have a problem with urinary tract infections. Finally that went away and instead I have diarrhea. These darn problems with MS.