I went through the whole process from a diagnosis of diverticulosis 25 years ago, to a a colonoscopy (all clear) to self-diagnosed lactose intolerance and imposed diagnosis (by Mrs T) of gluten intolerance.Given that we can talk about these things openly these days, I thought I'd start a poll. Me? I do four or five. I did the Bowel Cancer test thing I got through the post recently and that was all clear, so I suspect I'm OK.
It is clear I have lactose intolerance which is managed easily (lactose free milk and cheese, and lactase pills when I fancy some proper cheese).
However when I spent 10 days in Brazil last year, I ate any old crap and the guts were fine. 2-3 uncomplicated evacuations a day. My time in Brazil was insanely relaxing. I had some talks to give to students, but I find that an easy job. I was looked after and didn't have to think about anything.
So my assessment now is that anxiety is the main cause of 'liveliness', with a 20% add on from lactose. When I am stressed the guts settle. When I have too much time on my hands and start mithering about trivia, the guts go mad.
It is about the balance between the parasympathetic nervous system (that manages things when you are safe in your warm cave) and the sympathetic (that gets you into fight mode). Fight mode suits my guts. Safe mode is a problem, especially when I want to be safe but my job makes me go up to London. Still..... mind over matter seems to be working now.