Yes, dirty hands can cause Bacterial Vaginosis (BV). BV is caused by an imbalance of the bacteria that naturally live in the vagina. When bacteria from the hands is introduced into the vagina, it can disrupt the balance of bacteria and cause an overgrowth of bacteria, resulting in BV.
When people do not wash their hands properly or regularly, the bacteria on their hands can easily be transferred to the vagina when they touch it. This includes contact with objects such as sex toys or hands touching the area while using the restroom. In addition, when people do not practice proper hygiene after going to the bathroom, such as wiping from front to back, it can also spread bacteria to the vagina.
The use of antibiotics, douching, and scented soaps can also cause an imbalance in the bacteria found in the vagina, resulting in BV. Therefore, it is important to practice good hygiene, by washing your hands regularly and thoroughly, and avoiding the use of scented products in the vagina.