I had similar issues when I had my ileos - esp my end. My doc said that at the time I still had my rectum and it still had UC which was creating blood and that blood is one of the most irritating things for your rectum/anus and makes you feel like you still have UC (even after everything was gone) and have to go but for me it was worse because it felt like it was spasming (painful for me). Once the blood had passed I felt better...until it happened again.
I'm guessing it's the blood causing the pain and UC feelings. The question that will be answered by the pouchoscopy is where is the blood coming from. It could be pouchitis/cuffitis or a stricture. I hope it's something that's easily taken care of.
Ducridr - 37 - female
Diagnosed w/ severe pancolitis 11/20/2007
J-Pouch surgery #1 of 3 on 8/21/2009!!!
Surgery #2 - 1/4/2010
Surgery #3 - 3/23/2010