A very rare condition that usually only affects older men. The prostate is extremely painful and tender, and there’s usually a fever [see Diagram – Male Genital System]. It’s caused by the same bacteria as urinary tract infections, especially E. coli. Anyone with true acute prostatitis should probably be hospitalized for IV antibiotics, because the germ can get into the blood & cause Sepsis. (However, “acute prostatitis” is sometimes over-diagnosed when an examiner finds some prostate tenderness).
Men with mild urinary symptoms are often misdiagnosed with “acute prostatitis,” and given regular oral antibiotics. What they probably have instead is the common condition with a variety of names (see LUTS / BPH / “Chronic Prostatitis”).