The composition of the vaginal flora is relatively simple: It primarily If a patient is experiencing vaginal itching and burning even though the pH value is low, it is. Apr 11, - Most women will experience a vaginal yeast infection during their lifetime. Though these aren't usually serious, yeast infection symptoms can be bothersome. Normally, a balance of healthful bacteria and yeast live in the vagina. Yeast infections can cause bothersome itching and burning.