Excess mucus in IBS is caused by the intense spasming of the colon. When you have contractions of the colon, the mucus is secreted and allows smooth passage of stool. In normal people, this is done also but only a small amount is shed but with IBS the contractions and because they are more intense causes more mucus to shed which in turns is why you are passing so much.
The mucus in IBD (Crohn's and Ulcerative Colitis) is from the pus from the ulcers which is different from IBS mucus. You will usually see blood mixed in with that kind. That is maybe why you heard that mucus is from inflammation.
Hope this helps.
Co-Moderator ~ IBS Forum
Dx: IBS 1989, Diverticulosis 2004, Idiopathic Acute Colitis 2006, UCTD 2007
Meds: Plaquenil 400mg, Chlorzoxazone 500mg, Lyrica 50mg, Protonix 40mg, Naproxen 1000mg, Xanax XR 2mg, Miralax 17g, Supplements