Doing a FODMAPS diet properly for a while will identify most of the foods you have problems with, but it will not tell you why, and it may not deal with the causes,
It just tells you what is not good to eat at that time.
so it can help with lots of issues, bloating, gas, cramps etc
With fodmaps the idea is to eat so little of the sugars that are not well digested that you have no problems, and periodically reintroduce in small amounts to see if they are tolerated.
It's super easy to mix in with a paleo (not very-low-carb, just medium-to-low-carb) trial period too, as grains are fodmaps and have to be excluded for a while.
I found this podcast very useful, It's all FODMAPS
(find the podcast, link on the webpage)
Dr. Siebecker Explains the Art and Science of the FODMAP Diet
The science of FODMAPs starts in the name: Fermentable Oliogosaccharides Disaccharides Monosaccharides And Polyols. For many reasons, these carbohydrates are easily fermented and the byproducts of this cause digestive pain. But as we’ve discussed before this is very individual and the quantity consumed is very important.
http://scdlifestyle.com/2012/09/dr-...rt-and-science-of-the-fodmap-diet-podcast-45/