I believe the urgency is caused by the inflammation (which can be aggrivated by hard to digest foods like fiber and nuts) which causes the stool to pass through the diseased areas very quickly and can make you feel like you have to go when two seconds ago you didn't. There's also something called tenesmus which can cause you to feel like you have to go and then very little comes out when you try to go. Apparently, it too, is caused by the disease and the prescence of inflammation.
I think your dr can perscribe something for tenesmus but I'm not too familiar with what and how well it works.
Laurenne, 25 Graduate from University of California, Davis. BA-Anthropology
Dx'd w/ IBS and CD in 2002. Three abscesses that are now fistulas, with three setons!
On: 6MP, Zoloft, Cimzia (working so well, I'm on Miralax too!), folic acid, b12
Tried: LDN- Did nothing good, Remicade- allergic, Humira- no reaction