If you have diarrhea that is persistent, there is another issue that is likely causing it, rather than low fiber. You have a medical condition, see a doctor. If they don’t help see another one.
It could be as simple as stress. Some people have very twitchy adrenal activity and this can lead to the stomach upset. You could also be worrying yourself sick, similar to stress, but internal rather than external primary causes (though there is great overlap between environmental and mental stresses).
It could be a lingering stomach bug, food allergy/intolerance, an imbalance of bacteria in your stomach… the list goes on. We really do not have the ability to accurately answer your questions without knowing about your case history.
If your diarrhea is transient rather than ongoing and you are otherwise healthy, then you might want to try to attack the problem, here is how I deal with upset stomach:
- No booze, sugar, wheat
- Betaine HCl and digestive enzyme blend prior to meals
- yogurt 1-2 cups (plain real yogurt - I get an organic one because it has more types of bacterial cultures than any other one at the store I shop at), possibly a probiotic supplement, and ground flax seed(there is some fiber in here and I am liberal with its use)
I can usually get the next meal down and passed fine, but take the Betaine HCl, digestive enzymes, and probiotic supplement to support the ongoing repair of the stomach.