I know that when you ready about IBS it only says that colon is involved but does the small intestines get effected? like when your stomach is gurgling like crazy in the middle around your belly button. is that part of IBS? I found one article that talks about it in term so of all of your gut. http://www.netdoctor.co.uk/diseases/facts/irritablecolon.htmIve ready about an upper stomach problem that sounds like IBS only for the upper stomach. Non-ulcer dyspepsia. same kind of functional disorder.Just wondering why IBS is said to only involve the colon and what others experiences are.