IBS is nothing but a name they put on diarrhea or consitpation when they don't know what else to call it. After gallbladder removed I had issues with diarrhea for two years now. Never went the meds route but took the supplements route and food elimination route, still nothing was standing out for correction of it. Went to a GI doc and she immediately threw drugs at me to bind up the bile and said here try these for 8 weeks see if these work claiming I had classic symptoms of Bile Acid Malabsorption. She refused to take the two tests that definitely define that BAM is the cause of the diarrhea after gallbladder surgery. So will not go back to her. Right now I am 1 week with no sugar and low fat (75 grams a day or less) along with increased fiber. And guess what....no diarrhea. I believe it is the sugar that has been aggravating my system. Will stick to it. Sugar is not good anyway.

IBS is difficult to treat because they won't do testing for things such as low stomach acid, or bile malabsorption, or so many other things that can cause the problems. Also hard to treat because there is no one single thing that is the cause for everyone. Each person is unique and each person will have foods that can irritate it....it's a process that is unique to each. Thus making it harder to treat.

As for pelvic floor weakness....yes it helps, it's not just for urinary incontinence--it's all connected in there and if we have weak pelvic floor muscles (men have it too) we can't hold our poop or pee very well.

A GI mapping will look at any gut dysbiosis where there are bacterias that shouldn't be at certain levels are taking over causing diarrhea and such. Surgeries of any kind along with cancer and it's treatment I believe cause create havoc. Antibiotics are known to mess with the gut which is why diarrhea is the first side effect. It kills off or wards off not only the bad bacteria but the good and throws our system out of balance causing diarrhea. I have no doubt in my mind that cancer drugs do the same thing.

Everything starts in our gut. And when it out of balance we suffer all over.
Find a functional medicine doctor who is more knowledgable about this as a regular medical doctor isn't. Work together with both functional and regular medicine to find what will help you. I believe there is a place and need for both.