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What Is It?
Urethritis is an inflammation of the urethra, which is the tube that carries urine out of the body. Urethritis is usually caused by a sexually transmitted infection. Much less often, it is the result of an injury from an instrument such as a urinary catheter or exposure to an irritating chemical such as an antiseptic or a spermicide.
Doctors have historically classified sexually transmitted (infectious) urethritis into two categories: gonococcal urethritis, caused by gonorrhea bacteria, and nongonococcal urethritis, caused by bacteria other than gonorrhea.
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