4. History of VD: Participants will be required to meet criteria for VD based on history and examination: At least 3 month history of pain, burning, or irritation, with an intensity of 4/10 or greater of the vulva either localized to the vestibule and precipitated by contact of the vestibule (Provoked VD) or located in other regions of the vulva (called GVD). The pain must not be attributable to dermatitis, dermatosis, candida, hormonal changes, or vaginitis.