Vaginosis refers to an infection or inflammation of the vagina. It is often caused by an overgrowth of bacteria, yeast, or other organisms that are normally present in small amounts within the vagina. This can lead to symptoms such as itching, burning, discharge, and a foul odor. There are several types of vaginosis, including bacterial vaginosis (caused by an imbalance between good and bad bacteria), yeast infection (caused by the overgrowth of Candida species), and trichomoniasis (caused by a parasitic infection). Treatment typically involves antibiotics or antifungal medications, depending on the specific type of vaginosis.