Gonorrhea is a contagious sexually transmitted disease caused by the Neisseria gonorrhoeae bacterium. It can infect the genital tracts of both men and women, as well as the throat. While symptoms often include abnormal discharge and painful urination, many people are asymptomatic. It is diagnosed through tests of discharge from the urethra or cervix. Gonorrhea is treated with antibiotics prescribed by a doctor. Untreated gonorrhea can lead to serious complications, so testing and treatment are important.