I have to say that emotional stressors are the cause of IBS for me, usually oh what's the word...delayed. If I have 2 salads within 24 hrs, I get the glass through the intestines feeling, usually in tandem with a stressor...since the fact that the inlaws are almost a 24/7 stressor nowadays, it is logical that both in combination are causing severe pain/glass passing feeling/diarrhea. TMI...but so painful and distressing I almost pray for death when it occurs...