My father also had intestinal adhesions, although in his case they didn’t cause any problems until he tried to have them separated, and he ultimately died of complications of that procedure. But he’d had gut problems since childhood, and everything was very weak by the time he was old.
I’ve never had any abdominal surgeries, so I don’t know that I’d have adhesions. And wouldn’t they show up in a colonoscopy? One of the tests they did was a barium swallow, but that just follows food through to the small intestine.
No, i don’t think that would show up during a colonoscopy. It’s not that surface that adheres, but the surface facing the rest of your guts.
But i am not a doctor. 
if it is adhesions, they might be affecting the small intestine. Which is not examined at all during a colonoscopy. And as @puzzlegal says, colonoscopies inspect the inside of your pipes, while that problem is with the outside of your pipes.
Loosely speaking, your small intestine is 25 feet of soft floppy elastic tube about the diameter of a little finger. One end is fastened to the output end of your stomach and the other end is fastened to the input end of your colon. All the rest in the middle is just sorta piled in there loosely like a bunch of snakes in a bucket.
Normal functioning has that whole mass of tubing slowly seething as the wet chunks of whatever you ate work their way along and are slowly broken down. If the loops and coils start sticking to one another, or to the nearby organs or abdominal cavity wall, or a semi-kink develops in the tubing, you’ve got a problem developing. As long as everything can slide freely, any kink works itself out. As long as one part sticking to another is along a “straightaway” or is temporary all is well.
But if not … [cue ominous music].
I think the surface facing the food you are is theoretically the outside surface …
But yeah, what you said.
Oh, okay. Not what I thought. I may have to lay in some soft foods and try a few days of that.
StG