Gonorrhea A bacterial STD that’s easy to treat, but if left untreated can lead to infertility, arthritis, and heart problems. Often has no symptoms. Related Articles: Wrap it up, Grandpa! STI Rates are on the Rise, again, in Seniors over 60Glossary: Pelvic inflammatory disease (PID)Glossary: PID (pelvic inflammatory disease) Gonads GRS (genital reconstruction surgery)