The prostate gland is the largest male accessory gland, arranged like a guard in front of the bladder, so it is named prostate, which is located deep in the pelvis, the size of an inverted chestnut, the surface of the body can not be reached. The prostate is located in the center of the pelvis, between the bladder and the urogenital diaphragm. In front of the prostate is the pubic bone, which is close to the lower edge of the pubic symphysis; the distance is about 11.4 ± 3.7 mm, and behind it is the rectum, which is close to the lower end of the coccygeal bone, with a distance of about 50.8 ± 13.0 mm; below it is the urogenital diaphragm; and above it is the bladder. Due to the special location of the prostate, the doctor can touch the prostate in the rectum in front of the rectum through rectal palpation to understand the size of the prostate, the texture, the presence or absence of hard nodules and the presence or absence of obvious pressure and pain. For more information about the anatomy of the prostate, please consult a specialist.