Gonorrhea is a sexually transmitted infection caused by the bacterium Neisseria gonorrhoeae, affecting the urethra, rectum, throat, and cervix, with potential symptoms including painful urination and unusual discharge. It can be asymptomatic and is primarily spread through sexual contact, with risk factors including new or multiple partners. Untreated gonorrhea can lead to serious complications such as infertility, joint infections, increased HIV susceptibility, and issues in newborns during childbirth.