I have the same issue that you do Brian. I love to eat nuts, but too much of them will cause the thick stools too. I found that chocolate will do the same if I eat too much of it too. I try to limit my intake of these two foods. Not always successful, eating nuts is a favorite of mine. I had this issue crop up when I turned 40 and went to see a doctor about it. He had no idea and I ended up getting a colonoscopy. No issues found there. I finally put two and two together and found what was causing it. Not sure why it showed up at age 40, but I guess getting older has something to do with it.
Thank for the comment. I eat a lot of chicken, fish, whole wheat, fruits, nuts. Some pizza and candy now and then. I have a BM about once every other day. My stools are thinning out a bit with more whole grains and cutting back on the nuts to zero. I think nuts are hard to digest and can cause thick stools without a lot of fiber. Just a guess from a smart guy.
Well that was graphic, but I am sorry for your pain. I would try adding something like citracel to your diet you can get it just about any drugstore or market, should help things move along a little better. How long is it between your BM's? What is your normal diet like?