Urethritis is a condition in which the urethra, or the tube that carries urine from the bladder to outside the body, becomes inflamed and irritated. Urethritis - Learn about the causes, symptoms, diagnosis & treatment from the MSD Manuals - Medical Consumer Version. Urethritis is a lower urinary tract infection (UTI) that causes inflammation of the urethra—the fibromuscular tube responsible for expelling urine from the body in both males and females. Urethritis is the inflammation of the urethra, often caused by bacterial infection. Learn about the common causes, symptoms, diagnosis, and treatment of urethritis, as well as how to prevent it.
