I can't speak for everyone but my situation is different. Cramping and pain has been reduced to an almost non-existant level the past 12 months. eliminating sugar, wheat, corn, dairy and dozens of other foods is mostly responsible for it. i also believe that antifungal drugs helped quite a bit because prior to taking them i had incredibly low tolerance for carbs.When i get gas now (i am on a high legume diet), there is never any pain. There may be an extremely mild discomfort but that is all. This proves to me that ---in my case--- it is not the gas that causes the pain but it is the massive immune activation or chemicals that are being released in response to eating intolerant foods. i also think that when the colon is home to not-so-friendly microorganisms then these bugs can secrete metabolic byproducts that trigger both the immune and enteric nervous system.Concerning stress, it is also a trigger but it seems to pale in comparison to what certain foods can do to me. extreme negative stress is more likely to cause my brain to get into a state of confusion but it doesn't affect my gut unless it is the highest level panic situation which is a rarity.