Vaginitis in dogs can sometimes resolve on its own, especially in cases of juvenile vaginitis that often clears up as the puppy matures and goes through her first heat cycle. However, adult-onset vaginitis or cases associated with underlying causes, such as bacterial infection, urinary tract infection, or structural abnormalities, usually require veterinary medicine intervention. While some mild yeast infections may go away on their own, bacterial vaginosis usually clears up on its own, but left untreated, it can put your dog more at risk for other infections. Vaginitis typically affects young female dogs and spayed dogs. It's essential to monitor for clinical signs such as vulvar discharge and excessive licking and seek a physical examination to determine if further treatment is necessary to prevent secondary bacterial infections. Chronic vaginitis and idiopathic vaginitis might require ongoing management.