Bacterial Vaginosis is characterized by uncomfortable vaginal inflammation caused by the overgrowth of bacteria naturally found in the vagina, typically due to some kind of disruption of its natural balance. You may notice unusual vaginal discharge or odor, but many people do not seek out Bacterial Vaginosis treatment due to embarrassment or lack of knowledge about BV. However, because the infection causes inflammation, untreated BV makes it more likely to get an STI.