Bacterial Vaginosis, also known as BV, is a common type of bacterial infection causing an inflamed, malodorous and bothered vagina. It’s caused by an overgrowth of harmful bacteria that disrupts the delicate pH balance of the vagina. Circumstances that increase your risk of BV include unprotected sex, new sexual partners, douching and taking certain antibiotics. Symptoms include itching, burning, redness and swelling along with a classic fishy smelling gray or green vaginal discharge typical for BV.