Vulvitis, inflammation of the vulva can be a symptom for various disease conditions like injuries, herpes, virginities, external irritants, poor hygiene, poor nutrition or stress. Other factors which can cause red vulva include oral sex, bacterial or fungal infection, wearing the wet swimming suit for long hours, allergic reactions to certain products like soap, sanitary napkins, scented tissues, powders, deodorants, or tropical vaginal medications...