o.k. so I have the ibs for dummies book
it says you know your trigger food right away with ibs diarreah.
because you go right away. but what about ibs constipation
It is the feeling of being bloated after eating a trigger food that may be causing the constipation. so right after you eat something and feel like your full or bloated and it doesn't have to be a lot that could be the trigger food to constipation.