Chronic prostatitis/chronic pelvic pain syndrome
Chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS), previously known as chronic nonbacterial prostatitis and now classified by the US NIH as Category IIIa and IIIb prostatitis, is long-term pelvic pain and lower urinary tract symptoms (LUTS) without evidence of a bacterial infection. It affects about 2–6% of men.
Source: Wikipedia — Chronic prostatitis/chronic pelvic pain syndrome (CC BY-SA 4.0)