The main reason for this is the inflammation of the prostate gland and the hypertrophy of the prostate gland, and more rarely, the cancer of the prostate gland. 1, etiology: bacterial prostatitis etiology is mainly related to urinary tract infection, bacterial infection has a direct relationship. The actual fact is that you will find a lot of people who are not able to get a good deal on this. The cause of non-bacterial prostatitis is not very clear. Prostate enlargement is a disease of old age and is related to increasing age and the continued secretion of androgens. 2, clinical manifestations: the general symptoms of prostatitis are painful urination, urinary urgency, discharge from the urethra, and can cause loss of libido, premature ejaculation, seminal emission, and neurological weakness due to the disease. The more typical of prostate enlargement is difficulty in urination, prostatitis can have pain in the perineum, and prostate cancer can appear cachexia in its advanced stage. 3, examination means: mainly through the rectum to touch the prostate, to understand the size of the texture of the prostate. In addition, the size of the prostate can be determined by ultrasound, X-ray plain film can see whether the prostate has calcification, PSA test and MRI of the prostate can help identify benign and malignant diseases of the prostate. In short, the prostate gland is a common male and urological disease, but also more troubled male friends, so pay attention to the protection of the prostate gland in life.