The normal adult prostate is located in the lower part of the bladder and in front of the rectum, shaped like a chestnut, bottom up, tip down, bottom horizontal diameter about 4cm, longitudinal diameter about 3cm, front and back diameter about 2cm, weight about 20 g. The prostate is divided into five lobes, the middle and front lobes just between the urethra through, the left and right two lobes are also close to the urethra. The old man has a hyperplastic prostate (hypertrophy) due to disorders of sex hormone metabolism, which can cause difficulty in urination by pressing on the urethra. The prostate gland is made up of vesicular glandular tissue and prostate ducts. The prostate gland has a total of about 30 to 50 vesicles, which come together to form a total of 15 to 30 prostate ducts, also called prostate excretory ducts, which open on both sides of the seminal vesicles in the urethra. The fluid secreted by the prostate is called prostatic fluid, a milky white pulpy liquid that is also a component of semen. It contains sodium, potassium, calcium, and large amounts of zinc and magnesium. In addition, the prostate fluid is rich in acid phosphatase and yellowish lecithin vesicles. There is another liquefaction factor in the prostatic fluid, which is also a number of special enzymes. Their function is to convert the ejaculated semen, which is in a solidified state, into a liquid state so that the sperm in the semen can move.