Hello dear I understand your concern Lichen is autoimmune disease and have unknown etiology and trigger factor. It is characterized by eruption with characteristic shiny, flat-topped purple papules and plaques on the skin or mucous membranes. I would suggest to consult the dermatologist and undergo vaginal examination and skin Biopsy will to confirm the diagnosis. Doctor will give following advises: Topical steroids such as Clobetasol . Topical antihistamines. Avoid Alcohol, cigarettes, and spicy foods can worsen symptoms. Maintain proper pelvic hygiene, drink plenty of water and eat healthy diet. Hope this may help you Contact HCM for further health query Best regards Dr. Sagar