Inclusion Criteria:  Women, age ≥ 18 years Established diagnosis of LS (vulva and/or perineum and/or perianal region) Willingness to comply with study requirements No significant language barrier  Exclusion Criteria:  Concurrent immunosuppressive treatment A history of vulvar cancer and/or vulvar dysplasia A history of vulvar surgery A contraindication against clobetasol treatment A known sun light allergy A known skin condition interfering with local ablative treatment such as neurodermatitis or bullous pemphigoid