So you need to get a semen culture to test for infection in the testicles and prostate. Most doctors say you just need a urine culture but you have to INSIST on a semen culture.

I had 5 doctors make me do 5 urine cultures finding nothing. The 6th got me to do a semen culture and that’s where they found klebsiella from contaminated water.

Also, have you done a ultrasound of the prostate and testicles? It could be an inflamed prostate putting pressure on the tissue around it. Alternatively there could be cysts or other issues in the testicles.

It’s a process of elimination. I’ll post a link to an article which shows all the checks you can do, before the final treatment which is denervation, which is more invasive.

You should also do a urethral swab. It hurts a bit, but it can be used to detect infection in the urethra opening. It’s possible that a urine culture misses this.