Thanks for the post!
around labia could be fungal, bacterial, STD (gonorrhea, HIV
), irritation or allergy due to talc, soap, fibre of cloth etc, or vulvodynia. It could also be tinea cruris, which is causes rash and itching in groin area and skin folds. Infections like molluscum contagium too should be looked at. Boils and abscess or furunculosis too should be thought of.