If it's not one thing, it's another. My IBS has benn grand lately, if anything I've actually been constipated, which I'm not complaining about. But now I have the most painful canker sore on the tip of my tongue (and other on my cheek but not as painfull). I can't even talk properly, I sound drunk, and I can't eat either. I've always suffered on and off with this ugly sores, so I am an expert on medicines and SLS free toothpaste, but nothing is working on this one. The medicine doesn't stay on, as my tongue moves. I read somewhere that as the mouth is part of the digestive system, it can be related to IBS and chrown's, etc. sorry for the rant but I'm in sooo much pain!!