Nuts. Pistascios and macadamia nuts especially cause me great amounts of distress. Fiber in general does this to me as well. In a way this reaction was what led me to find I was celiac as I was looking for information as to why oats caused me distress.

I find that when I eat to many nuts I have very loose stools. Its to much of a change at once. Sounds like you are getting to much fiber in comparision to your meats. try to get some chicken or other meat in to help bulk up you stools, and cut back on the nuts. Good Luck!

Possibly too many eggs? I know if I overdo the eggs, which for me is more than 3 a day for more than a few days in a row, I will feel the pain!

Sounds like the IBS-D I had for 10 years. Went away after I went hard core Paleo (offal, coconut oil, fermented foods, bone broth etc), plus home-made goat kefir. Became completely asymptomatic as long as I was keeping my carbs below 60-70 gr a day. Eating lots of fish too, not just meat.

I get a similar problem - intense constipation followed by half a day of nausea and then a massive bout of diarrhea. Very unpleasant. Still trying to figure out what exactly are all the things that trigger it - definitely nuts, oats, and prunes (my mother suggested them as a remedy, so I ate a bunch...bad plan). I'm pretty sure non-fermented dairy does, too, and possibly chickpeas. Probably more stuff but it's hard to pin down the culprits. I'm actually going to see a gastroenterologist soon for that and some other issues.

nuts, especially whole are difficult on the digestive system (try nut butter in small amounts or grind your nuts)

fat, too much causes floaty stools and can cause dirreahea for some

fiber, too much fibery carbs can cause it as well, and in combo with the above.

fruit, fruit is generally good in moderate amounts, but try bananas and apples w/o the skin for now

feel better!