The possible causes of mucus outflow after urination: a. Urethritis. Urethritis can flow out after urinating mucus, mostly pus, accompanied by symptoms of frequent urination, urinary urgency, painful urination. Mostly with the infection after the urethral gland secretion, or the presence of purulent secretions accumulate in the urethra after urination is completed, with the urethra closed and squeezed out of the urethral opening. The actual fact is that you will need to have a routine urine examination, and you must retain the mucus secreted from the urethra for bacterial culture examination to further confirm the diagnosis. The second is that men with prostatitis can also appear to have mucus outflow after urinating, and the outflow is mostly prostate fluid. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. It is a good idea to have a good look at the product. The actual fact is that you will need to take a look at the prostate fluid and have an ultrasound examination of the prostate gland to determine if it’s prostatitis and need anti-infection treatment.