Fructose intolerance was my problem and it took years of meds and surgery to find that out. Everyone raves how good fruit is for you but about 30% of the population has an intolerance and is not aware of it. Try cutting out all fruit and related foods for a week. The relief was in about 1 1/2 days. It was amazing all the problems it was causing. Even a little bit for me causes major pain. I was tested for it at MAYO and it was negative but turns out the test aren't always accurate. Please read my previous post on the subjects.