Hi,
interesting post. I have been experiencing the same problems for 10 years! Went to a couple GIs, had a flexible sigmoidoscopy, biopsy and all the results are normal. The cause is still unknown.
The only thing I know is that I started having problems after a raw oysters dinner. I got a very severe diarrhea and ever since I am gaving problems. Once every few week. Sometimes 2 wks, sometimes 2 months in between.
The bowel movements start with a normal (or maybe a bit harder stool) and end up with a very watery stool. Sometimes the bowel movements last 1hr. The come in very painful waves. Once the watery stool is out, all the pain stops. Unfortunately, the abdominal pain is very severe and afterwards I fel very exhausted.
Basically, I gave up on finding the problem given that no Gi has found anything.
Al3x, how are you doing? Got any results or diganosis back?