
The exact cause is not fully understood. It is thought to involve a combination of immune, hormonal, and genetic factors. It is not contagious and cannot be spread through sexual contact.
Contributing factors include an autoimmune response where the immune system attacks healthy skin in the genital area, low oestrogen levels after menopause, genetic predisposition (lichen sclerosus can run in families), previous skin damage to the area, and a higher rate of occurrence in women who already have other autoimmune conditions such as thyroid disease, vitiligo, or alopecia areata.
Without treatment, lichen sclerosus worsens. Scar tissue causes the labia to fuse, the clitoral hood to adhere, and the vaginal opening to narrow, making intercourse and sometimes urination painful. Chronic itching, burning, and rawness affect daily comfort and sleep. Many women avoid sexual activity, which over time affects relationships and mental health.
The most serious long-term risk is vulvar squamous cell carcinoma. Women with longstanding, untreated lichen sclerosus have a small but real increased risk of this cancer. Regular specialist monitoring reduces this risk significantly, which is why annual review is recommended for every patient, even when symptoms appear controlled.
Lichen sclerosus is classified by where it appears. Vulvar lichen sclerosus affects the skin of the vulva, labia, clitoris, and perianal area and is the primary form managed by a gynaecologist. Extragenital lichen sclerosus affects skin elsewhere on the body such as the upper torso or arms and rarely causes scarring at those sites; it is usually managed by a dermatologist. Some women have both forms at the same time.
Lichen sclerosus cannot be cured, but it can be controlled. Early, consistent treatment prevents scarring and reduces the risk of long-term complications.
Lichen sclerosus is diagnosed through clinical examination and, where the picture is unclear, a skin biopsy.
Clinical examination: A gynaecologist examines the affected skin for characteristic white, fragile patches, scarring, and any structural changes sufficient for diagnosis in most cases.
Vulvoscopy: Uses a colposcope to examine the skin in more detail, particularly when the appearance is atypical.
Skin biopsy: A small tissue sample taken under local anaesthetic, used to confirm the diagnosis and rule out vulvar intraepithelial neoplasia (VIN) or vulvar cancer where there is any doubt.
Thyroid function tests and thyroid antibody screening: Recommended at diagnosis, given the association between lichen sclerosus and autoimmune thyroid disease.
Before treatment begins, stop using all fragranced soaps, body washes, bubble baths, and synthetic sanitary products, as these should not be reintroduced after treatment starts either. Avoid scratching the affected area in the days before consultation, as this alters the clinical appearance. If a biopsy is planned, avoid sexual intercourse and topical applications to the area for 48 hours beforehand. Bring a record of any topical preparations you have already applied to the area, including the product name, strength, and how long you used it.
Provide a full medical history at the consultation, including any autoimmune conditions, skin conditions, allergies, and current medications.
Lichen sclerosus requires ongoing management. Apply the prescribed corticosteroid or topical medication exactly as directed and do not reduce or stop without consulting your specialist, even when symptoms have improved. Symptoms that disappear do not mean the condition has resolved; it means treatment is working.
Wash the genital area with plain warm water only and pat dry gently. Apply fragrance-free emollient at least once daily. Wear loose cotton underwear and avoid tight trousers, synthetic fabrics, and sanitary pads with plastic backing.
Attend follow-up appointments every 6 to 12 months. At each visit the specialist checks treatment response, monitors for scarring, and examines the skin for any changes that need biopsy. If you notice a new lump, ulcer, or an area that bleeds without reason between appointments, seek review promptly rather than waiting for the next scheduled visit.
Symptoms typically improve within 3 to 6 months of starting treatment. The goal is control, not cure. Lichen sclerosus is managed over the long term rather than resolved with a single course of treatment.
For ongoing comfort, continue the daily emollient routine, avoid all irritants, and use vaginal moisturisers or lubricants if intercourse remains uncomfortable despite treatment. Over-the-counter antihistamines help with nighttime itching. Cool compresses provide short-term relief from burning.
If intercourse remains painful despite medical treatment, discuss surgical correction of structural changes with your specialist. Many women find that pain and discomfort reduce substantially once treatment is established, though this takes several months.
Lichen sclerosus affects confidence and intimacy for many women. Counselling or patient support groups help with the psychological side of managing a chronic condition. Annual surveillance appointments should not be missed even when the condition feels well controlled.
No. There is no cure, but symptoms can be controlled well with treatment. Many women reach a point where they have no active symptoms, though the condition remains present and requires continued management.
No. It is not an infection and cannot be passed on through sexual contact or any form of physical contact.
Women with longstanding untreated lichen sclerosus have a small increased risk of vulvar squamous cell carcinoma. Consistent treatment and annual specialist review reduce this risk. This is the main reason surveillance cannot be skipped even when symptoms are absent.
Over-the-counter creams are not effective for lichen sclerosus. The condition requires prescription-strength corticosteroids prescribed and monitored by a specialist. Using the wrong product delays treatment and can worsen symptoms.
Untreated lichen sclerosus commonly causes pain during intercourse. With appropriate treatment, many women return to comfortable sexual activity. Vaginal moisturisers and lubricants help with dryness and friction. If pain persists despite medical treatment, surgical correction of structural changes is an option.
Yes. While it is more common after menopause, lichen sclerosus affects women of any age, including young women and, rarely, children.