Something to think about in regards to constant Diarrhea, have your iron levels checked.
10 years ago, I couldn't be more than a couple of minutes from a toilet after eating (going out to eat would nearly be a disaster). My iron levels were checked, they were off of the charts, turns out I have Hemochromatosis. As my iron levels were brought under control, the issue went away, and what a relief it has been.
Hemochromatosis is common but goes undiagnosed for a lot of people.
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nine mile skid on a ten mile ride