Vulvitis is an itchy inflammation of the vulva, the soft folds of skin outside the vagina. It's not so much a condition as it is a symptom of certain diseases, infections, injuries, allergies, or simply a reaction to an irritant or activity. The frustration is usually identifying the cause.
Any woman with allergies, skin sensitivities, conditions, or diseases can develop vulvitis. Girls who have not yet reached puberty and post-menopausal women may possibly develop the irritation because of low estrogen levels.