The exact cause of<unk>  is unknown. Studies are being done to determine the cause of<unk> . The following factors have been associated with<unk> : * HPV (Human Papilloma Virus) * HSV-2 (Herpes simplex Virus - Type 2) * Smoking * Immunosuppression * Chronic<unk>  irritation * Conditions such as Lichen Sclerosus
Vulvar intraepithelial neoplasia
Vaginal intraepithelial neoplasia
Anal dysplasia
Vulvar cancer
Vulvar myiasis
Squamous intraepithelial lesion
Human papillomavirus infection
Cervical polyp