Prostate fluid is extracted mainly by rectal examination and by massaging the prostate. The doctor will wear gloves in advance, apply a small amount of lubricant to the index finger, gently massage the anus with the belly of the finger, and then slowly insert it 4 to 6 centimeters into the anus. The doctor will probe the prostate to find out the size, contour, hardness, smoothness of the surface, and the presence of nodules. Then, there will be index finger massage on the prostate, that is, gently and slowly massaging or squeezing the prostate with the abdomen of the index finger. After the massage, a small amount of prostate fluid will flow from the urethral opening, which will be retained and sent to be examined for routine prostate fluids and culture of prostate fluids, and other related examinations. If prostate fluid is not discharged after prostate massage, urine examination can also be performed after prostate massage, which can also reflect the situation of prostate fluid to a certain extent. If you need to extract prostate fluid for examination, it is recommended to go to a regular hospital for laboratory tests.