An episode will usually last about 1 - 3 hours. The pain comes in waves sort of like
menstrual cramps. It seems to come on if I have been particularly active, standing for long periods of time, go a long time on an empty stomach, or eat a heavy meal. My bowel habits have not changed nor does a bowel movement have any affect on the cramps. I have daily, regular bowel movements; no constipation or diarrhea.