While the only way to fully protect yourself from STIs is to use protection every single time (and even then, there is still a risk of some viral infections), it is imperative to be able to recognize the symptoms in the case that an accident occurs. An extremely common STI in the US is gonorrhea, a bacterial infection that grows readily within the reproductive tract of both men and women. The CDC estimates that 700,000 Americans are infected with gonorrhea every single year, although only half of this number is reported. Gonorrhea can be spread through any sexual contact (mouth, penis, anus, vagina), but can also be spread from a mother to child during delivery. Because the bacteria can be found anywhere within the reproductive tract (including the entrance of the urethra), ejaculation does not have to occur for the infection to spread. Symptoms can differ between men and women. While some men do not experience any symptoms, those that do may experience burning while urinating, odd-colored penile discharge, and swollen, painful testicles. In women, symptoms are often confused with a bladder or other vaginal infection. Symptoms include burning sensation while peeing, increased vaginal discharge and bleeding between periods. While gonorrhea is curable, untreated gonorrhea can lead to pelvic inflammatory disease in women and permanent reproductive damage. Once diagnosed, gonorrhea can be treated with several different types of antibiotics.
All facts found at cdc.gov