Bacterial vaginosis is a common vaginal infection that is caused by a disturbance in the balance of vaginal bacteria. Its common symptoms include vaginal discharge, a fishy smell, burning, and itching. It is not classified as a sexually transmitted infection (STI), but sex is a trigger. Usually antibiotics can clear up bacterial vaginosis, but if you have it, you are more vulnerable to STIs and can develop complications of pregnancy too. If you have any of the above symptoms, consult your doctor for a diagnosis and BV treatment.