Urethritis is an infection of the male urethra, or the tube that carries urine from the bladder to the outside of the body. Nongonococcal means it is not caused by gonorrhea. To find out if you have nongonococcal urethritis (NGU), you must be examined by a doctor or nurse and have lab tests done.
NGU is most commonly caused by a bacterial infection, but it may also be caused by a virus. One of the causes, chlamydia, can lead to complications in men and women.