Last night at around 6 p.m I ate some rhubarb (which I cooked down with some sugar). This morning I had bad cramps and diarrhia afterwards. Could it be caused by the rhubarb ? I ate it together with some rice pudding. I must admit the rice tasted kind of old and I felt a little sick to my tummy after eating it but it went away after an hour or so. I doubt that old rice causes diarrhia or does it ? Just wondering because my stools are pretty normal lately and the last time I had diarhia was about 3 weeks ago.