I was curious about this, and found that some doctors consider stress
and tension to be a possible cause of
prostatitis, as opposed to bacterial infections (particularly tension that is involuntarily focused on, and carried by, the prostate).
The main difference, though, is that this time I have persistent leg, ankle, and foot pain, which is almost incapacitating when I exercise. I assume that it is related, because I've read about leg pain being a common symptom of prostatitis.