Prostate cleansing, which involves injecting medication into a catheter to clean the outside of the urethra and prostate, is not clinically recommended. Prostate cleansing is performed by placing a catheter in the urethra and injecting saline into the catheter to flush the urethra and prostate. Prostate flushing is not clinically recommended because it is not very therapeutic and can cause a number of side effects. Prostate douching is harmful to the patient and may cause damage to the prostate and urethra, such as bleeding, infection and stricture of the prostate. If the infection is serious, pus may also appear, so it is not recommended that patients undergo prostate flushing.