Diagnostic Approach for Chronic Excoriation of the Labia

Initial Clinical Assessment

The American College of Obstetricians and Gynecologists recommends documenting the duration and pattern of symptoms, including chronicity, cyclical nature, and any periods of remission, in patients with chronic labial excoriation 1
The British Association of Dermatologists suggests distinguishing between pruritus, pain with erosions/fissures, or compulsive picking behavior to guide further evaluation 2
The Centers for Disease Control and Prevention recommends assessing sexual history and STI risk factors to identify potential infectious causes 4, 5

The American Urological Association recommends biopsy of the affected area as the first step to confirm lichen sclerosus and rule out squamous cell carcinoma, given the 3.5-5% malignant transformation risk in lichen sclerosus 1, 2
The National Comprehensive Cancer Network recommends baseline laboratory studies, including CBC and metabolic panel, to assess for potential complications 6

The Centers for Disease Control and Prevention recommends STI testing, including gonorrhea and chlamydia nucleic acid amplification tests, particularly if Bartholin or Skene gland involvement is suspected 4, 5
The Infectious Diseases Society of America recommends viral culture for HSV when ulcerations are present, and serologic testing for syphilis with confirmatory treponemal testing if papules are present 3

The British Association of Dermatologists notes that lichen sclerosus has a bimodal presentation, peaking in prepubertal and postmenopausal women, and requires long-term management and surveillance for malignancy 2
The American College of Obstetricians and Gynecologists recommends assessing for autoimmune associations, such as autoimmune disease history, in patients with lichen sclerosus 3