Not particularly painful, but as uncomfortable as you might imagine having a tube pushed up your urethra, squeezing past your urethral sphincter (easily the worst bit) and then manually filling your bladder to bursting point with saline solution would be.
The assisting nurse was kind enough to give me a prostate exam at the same time, though. Really took the edge off.
(, Wed 9 Feb 2022, 18:29, Reply)
And a gastroscopy (mouth, throat, stomach, small intestine) in the same year.
I don't recommend either, but as you say, they're not painful - just **intensely** uncomfortable.
(, Thu 10 Feb 2022, 12:02, Reply)