Type II chronic prostatitis is predominantly a retrograde infection, with the pathogen being mainly Staphylococcus spp. followed by pathogenic bacteria such as Escherichia coli. The disease is characterized by some of the following features, which can be demonstrated in most patients 1, the route of infection: retrograde infection is predominant. The spread of infection in the tissue lesions around the prostate is also one of the pathways to be considered. The pathogenic bacteria within the tissue lesions around the prostate, originating from bacteria in the intestinal tract, can spread directly or spread through the lymphatic vessels to invade the prostate, such as patients with chronic enteritis or hemorrhoids. 2, chronic inflammatory infections are good for the glandular tissue: the site of prostatitis is mainly in the glandular tissue. These ducts open into the urethra, and secretions from the gland are discharged into the urethra by the ducts. The ducts of the vesicular glands that originate in the periurethral region and the central region run in a prograde direction with the urethra and open to the seminiferous appendages, and secretions are discharged smoothly. Therefore, inflammation rarely occurs in the periurethral region and the vesicular glands of the central region. The peripheral area of the gland group of the duct opening in the adjacent membrane urethra, into the urethra at right angles, and the diameter of the opening is small, secretions are not easy to discharge, the peripheral area of the gland group for the prostatitis good area. The actual histopathological features: (1) Inflammatory reaction is limited in one or more glandular ducts. (2) The presence of both acute and chronic inflammation. (3) The presence of inflammatory cells within the prostatic excretory ducts (ducts), which are a reliable basis for the morphological diagnosis of prostatitis, is also the pathological basis for clinical prostate massage fluid assay for pus cells. (4) There can be microabscess lesions in the prostate, the lesions are very small, the lesions are not removed may be one of the reasons for the recurrent onset of chronic prostatitis, sampling examination, if the sample is not in the onset site difficult to get a positive result, according to the NIH classification is III chronic non-bacterial prostatitis.