Why does lichen planus sometimes go undiagnosed for so long?

Because erosive lichen planus can look like a persistent infection, contact dermatitis, or non-specific vulvitis - and providers who are not specifically trained to examine vulvar tissue may miss it. Vaginal involvement can also be overlooked during a routine pelvic exam if the upper vaginal walls aren't carefully inspected. A specialist evaluation with a trained eye - and biopsy when needed - is the reliable path to diagnosis.

What are the treatment options for lichen planus?

Treatment focuses on suppressing the autoimmune inflammation and preventing scarring. First-line therapy is high-potency topical corticosteroids such as clobetasol or fluocinonide. For vaginal involvement, hydrocortisone suppositories or vaginal applications may be used alongside vaginal dilators to prevent scarring and narrowing. Topical immunomodulators like tacrolimus or pimecrolimus are used in some cases. Widespread or refractory disease may require systemic therapy.

Lichen Planus

Q: What is vulvar lichen planus?

Lichen planus is an autoimmune inflammatory disorder that can affect the vulva, vagina, and other mucous membranes. The most common and serious form in the genital area is erosive lichen planus, which causes bright red, fragile, and ulcerated tissue. Unlike lichen sclerosus - which primarily affects the outer vulvar skin - lichen planus can involve both the vulva and the inside of the vagina, making it potentially more destructive if not treated early.

Q: How is lichen planus different from lichen sclerosus?

Both are chronic autoimmune inflammatory conditions, but they are distinct. Lichen sclerosus typically causes white, thin, papery skin and intense itching primarily on the outer vulva. Lichen planus, particularly the erosive type, causes red, ulcerated, and fragile tissue and is more likely to involve the vagina. Vaginal involvement in lichen planus can cause scarring, narrowing of the vaginal canal, and discharge - complications lichen sclerosus doesn't typically cause. They can co-exist and sometimes require a biopsy to distinguish.

Q: Can lichen planus cause permanent vaginal scarring?

Yes - and this is why early treatment matters. Untreated erosive lichen planus can cause progressive scarring of the vaginal walls, narrowing of the vaginal canal, and fusion of vaginal tissue. These structural changes can be difficult or impossible to fully reverse. Vaginal dilators are used proactively to maintain vaginal caliber during treatment. This is not a condition to watch and wait on.

Lichen planus can scar the vagina from the inside - which is exactly why it needs a specialist, not a waiting room.

Erosive lichen planus is a serious autoimmune inflammatory condition that affects the vulva and, critically, can extend inside the vagina. Unlike many vulvar conditions that cause discomfort and itching, erosive lichen planus can cause progressive scarring of the vaginal walls and narrowing of the vaginal canal - structural damage that is largely preventable with early, consistent treatment but difficult to reverse once established.

If you have painful, red, fragile vulvar or vaginal tissue - especially with yellow discharge, bleeding, or worsening pain during intercourse - a specialist evaluation is urgent. This is not a condition to observe and wait on.

How lichen planus is different from lichen sclerosus

Both are autoimmune inflammatory conditions, but they are distinct in how they present and what they can damage:

Lichen sclerosus

White, thin, papery skin
Intense itching is dominant
Primarily affects outer vulvar skin
Vaginal involvement uncommon
Risk of vulvar cancer with untreated disease

Lichen planus (erosive)

Bright red, ulcerated, fragile tissue
Pain and burning are dominant
Can affect vulva AND vagina
Vaginal scarring and narrowing is a real risk
Yellow vaginal discharge common

They can co-exist, and sometimes a biopsy is needed to distinguish them clearly. Neither should be managed with a "try this and see what happens" approach.

Symptoms of erosive lichen planus

Burning or pain in the vulvar area
Bright red, eroded, or ulcerated tissue
Pain during or after intercourse
Bleeding or tissue tearing
Yellow vaginal discharge
Progressive scarring or narrowing

Treatment

Treatment targets the underlying autoimmune inflammation and protects against structural damage:

High-potency topical corticosteroids (clobetasol or fluocinonide) applied to vulvar lesions
Intravaginal treatments - hydrocortisone suppositories or applications for vaginal involvement
Vaginal dilators used proactively to maintain vaginal caliber and prevent scarring
Topical immunomodulators (tacrolimus, pimecrolimus) for selected cases
Systemic therapy when topical treatment is insufficient for widespread disease
Regular follow-up to monitor response and catch structural changes early

Comfort first: Any biopsies or procedural interventions are performed with nerve blocks and nitrous oxide available to minimize discomfort.

Frequently asked questions

What is vulvar lichen planus?

Lichen planus is an autoimmune inflammatory disorder affecting the vulva, vagina, and other mucous membranes. The most serious genital form is erosive lichen planus, which causes bright red, fragile, ulcerated tissue. Unlike lichen sclerosus, it can involve the inside of the vagina and cause scarring of the vaginal canal - making early diagnosis and treatment especially important.

How is lichen planus different from lichen sclerosus?

Lichen sclerosus causes white, thin, papery skin with intense itching and primarily affects the outer vulva. Lichen planus, particularly the erosive type, causes red, ulcerated, fragile tissue with burning and pain, and is more likely to involve the vagina. Vaginal involvement in lichen planus can cause progressive scarring and narrowing. They can coexist, and a biopsy is sometimes needed to distinguish them.

Can lichen planus cause permanent vaginal scarring?

Yes - and this is why early treatment is critical. Untreated erosive lichen planus can progressively scar and narrow the vaginal canal. These structural changes are largely preventable with consistent treatment and proactive use of vaginal dilators, but are difficult to fully reverse once established.

Why does lichen planus go undiagnosed for so long?

Because it can resemble a persistent infection, contact dermatitis, or non-specific vulvitis. Providers not specifically trained in vulvar examination may miss it. Vaginal involvement is often overlooked during routine pelvic exams. A specialist evaluation - with biopsy when needed - is the reliable path to diagnosis.

What treatments are available?

First-line treatment is high-potency topical corticosteroids. For vaginal involvement, intravaginal corticosteroids and dilators are added. Topical immunomodulators are used in some cases. Widespread disease may require systemic therapy. Regular follow-up is essential to monitor response and prevent structural progression.

Early treatment prevents the damage that later becomes irreversible.

If you have symptoms consistent with erosive lichen planus - or have been diagnosed but feel your treatment isn't working - Dr. Toubi's Beverly Hills practice offers expert, specialized care for complex vulvar skin conditions.

Schedule an evaluation

Vulvar specialistBeverly HillsAutoimmune skin conditions