The prostate fluid needs to be obtained by transanal prostate massage. Methods of obtaining: 1. The patient adopts a chest and knee position, kneeling on the bed with the hips elevated. However, if a patient with inconvenient legs and feet is unable to kneel on the bed, he or she can take a lateral position, bend the knee unilaterally, lift up against the chest, and expose the perianal area; 2. Clean the perianal area, and after proper disinfection, the doctor wears sterile gloves and lubricates his fingers fully, and lubricates the area around the anus; 3. This is the prostate tissue, which is elevated on both sides and depressed in the middle. Massage from both sides to the middle, each time for 3-5 seconds, 3-5 times in a row. The patient is asked to take a sterile slide and place it at the urethral orifice, and the prostatic fluid dripping from the urethra can be placed on the slide and immediately sent for laboratory testing.