Vulvovaginitis is inflammation or irritation of the vagina and vulva (the opening of the vagina). Mild vulvovaginitis is a very common problem in young girls. It will affect most girls at some stage. Some girls will have vulvovaginitis many times. As girls begin to develop breasts, their vuvlovaginitis usually gets better. In most girls, vulvovaginitis is not a serious problem and it will usually improve with simple steps. In most cases, no treatment or tests are needed.