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Health condition · Clinically reviewed

Oral lichen planus, Wickham’s striae, erosive disease - and why monitoring matters.

A chronic mouth condition that can be mild and lacy or sore and erosive. Diagnosis and a clear treatment ladder make it manageable, with regular checks to keep it that way.

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Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against British Society of Oral Medicine (BSOM) and NICE Clinical Knowledge Summaries you can see at the end.

  • 03

    Current for 2026

    Reflects modern UK practice including topical therapy, lichenoid trigger review and annual malignancy surveillance.

Key facts

Oral lichen planus at a glance.

The essentials, in plain English - what it is, the types, and how it’s managed in the UK today.

  • What it is

    A chronic inflammatory condition of the oral mucosa, thought to be a T-cell mediated autoimmune process directed at basal keratinocytes.

  • Types

    Reticular (lacy white lines, usually painless), erosive or atrophic (red, sore, ulcerated) and plaque-like - often overlapping in one mouth.

  • Skin link

    Can occur with or without lichen planus on the skin, scalp, nails or genital area - worth checking all three sites.

  • Typical site

    Buccal mucosa, usually bilateral and symmetrical - a helpful clue that distinguishes it from a one-sided lichenoid reaction.

  • First-line care

    Topical corticosteroids for symptomatic disease, with topical calcineurin inhibitors as a steroid-sparing alternative.

  • Why it matters

    Carries a small but real long-term risk of oral squamous cell carcinoma, so regular specialist monitoring is part of routine care.

Why this guide matters

A biopsy-led plan, not a guessing game.

Oral lichen planus is common, usually manageable, and needs a clear diagnosis before treatment. The three points below shape everything else on this page.

  • Not all patches are the same

    Reticular disease is often symptomless, but erosive and atrophic disease can be genuinely painful and needs active treatment.

  • Biopsy settles the diagnosis

    A biopsy confirms lichen planus and, crucially, rules out dysplasia - particularly important for erosive or persistent lesions.

  • Surveillance is part of the plan

    The small long-term malignancy risk means regular specialist review, not a one-off diagnosis and discharge.

How the diagnosis is made

From first patches to a clear plan.

The steps a UK dentist, GP or oral medicine specialist will normally follow, in order - so you know what to expect and why.

  1. 01

    Assessing

    Clinical examination

    Looking for the characteristic lacy white lines of Wickham’s striae, usually bilateral on the buccal mucosa, plus any erosive or atrophic areas.

  2. 02

    Assessing

    Full mucocutaneous check

    Skin, scalp, nails and genital mucosa are examined, since lichen planus can appear at more than one site.

  3. 03

    Assessing

    Gingival assessment

    Looking for desquamative gingivitis - sore, peeling, red gums that can occur alongside or instead of buccal changes.

  4. 04

    Confirming

    Biopsy for confirmation

    Recommended for erosive, atrophic or persistent lesions, to confirm the diagnosis histologically and exclude dysplasia or early malignancy.

  5. 05

    Confirming

    Patch testing if indicated

    Considered when a lichenoid reaction to a dental material, such as amalgam, or a medication is suspected rather than true oral lichen planus.

  6. 06

    Planning

    Specialist oral medicine referral

    For diagnostic uncertainty, erosive disease, refractory symptoms or any area of concern that needs closer surveillance.

  7. 07

    Planning

    Baseline photographs and plan

    A record of the pattern and extent of disease, used to judge treatment response and detect change at future review visits.

Typical timeline: an initial dental or GP visit to a settled plan within a few weeks.

Symptoms

What oral lichen planus actually looks like.

The classic lacy white pattern, the erosive form that actually hurts, and the features that mean it’s time to escalate.

  • Lacy white patches

    Wickham’s striae - fine, white, lace-like lines on the buccal mucosa, often bilateral and frequently symptomless.

  • Soreness and burning

    Particularly with erosive or atrophic disease - a persistent burning sensation, worse with certain foods.

  • Sensitivity to spicy or acidic food

    Citrus fruit, tomatoes, vinegar and spice commonly trigger discomfort on eroded or atrophic areas.

  • Red, atrophic areas

    Thinned, inflamed mucosa that looks smooth and shiny rather than lacy - a marker of more active disease.

  • Erosions and ulceration

    Painful open areas within erosive disease, sometimes with a fine white border at the edge of the ulcer.

  • Desquamative gingivitis

    Red, peeling, tender gums that bleed easily - a gum-specific presentation that is often overlooked.

  • Plaque-like patches

    Thickened white areas that can resemble leukoplakia, most often seen on the tongue in smokers.

  • Red flag - non-healing or indurated area

    A thickened, ulcerated or firm area that doesn’t settle deserves prompt biopsy to exclude malignant change.

Treatment

How oral lichen planus is treated in the UK.

Topical corticosteroids first, trigger review and good oral hygiene alongside - and specialist-led options for severe or refractory erosive disease.

  • Topical corticosteroid

    First-line for symptomatic disease - typically a potent gel, ointment or mouthwash used directly on affected areas.

  • Topical calcineurin inhibitor

    Tacrolimus or pimecrolimus - a steroid-sparing alternative for persistent or steroid-resistant erosive disease.

  • Trigger review

    Checking dental materials, such as amalgam fillings, and medications that can cause a lichenoid reaction, and addressing or removing them where relevant.

  • Oral hygiene optimisation

    Gentle, thorough plaque control reduces gingival inflammation and can meaningfully ease desquamative gingivitis.

  • Dietary adjustment

    Avoiding spicy, acidic, hot or hard-textured foods while erosive areas are active reduces day-to-day discomfort.

  • Intralesional corticosteroid

    Reserved for stubborn, localised erosive or ulcerated areas that haven’t responded to topical treatment alone.

  • Systemic immunosuppression

    For severe or refractory erosive disease, under specialist oral medicine - options include oral corticosteroids or steroid-sparing agents.

  • Regular surveillance

    Typically annual specialist review, given the small long-term risk of oral squamous cell carcinoma, especially with erosive or atrophic disease.

What this guide is based on

The sources behind every claim on this page.

UK national guidance and specialist society standards, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your dentist, GP or oral medicine specialist knows your mouth and history and can tell you which parts apply to you. If in doubt, get seen.

  • British Society of Oral Medicine (BSOM). Guidance on oral lichen planus.

  • NICE Clinical Knowledge Summaries (CKS). Lichen planus.

  • British Association of Oral and Maxillofacial Surgeons. Oral mucosal disease resources.

  • World Workshop on Oral Medicine. Consensus guidance on oral potentially malignant disorders.

Red flags

When oral lichen planus needs urgent attention.

Most oral lichen planus is manageable with routine care. These are the situations that aren’t - and where a specialist opinion is needed promptly.

  • Non-healing ulceration

    An ulcer or eroded area that persists beyond three weeks despite treatment needs urgent biopsy to exclude malignant transformation.

  • Induration or a firm edge

    A thickened, hard or rolled border within a lesion is a classic warning sign of early oral cancer and needs specialist review.

  • Rapidly enlarging area

    Any patch or ulcer that is visibly growing week to week should be assessed promptly rather than watched.

  • Unexplained bleeding

    Spontaneous bleeding from a lichen planus lesion, not explained by trauma or brushing, warrants same-week assessment.

  • Fixed, unilateral lesion

    True oral lichen planus is usually bilateral and symmetrical - a one-sided, unchanging patch raises suspicion of a lichenoid reaction or another diagnosis.

  • Numbness or altered sensation

    Loss of sensation in the lip, tongue or jaw alongside a mucosal lesion is a red flag for nerve involvement and needs urgent referral.

  • Significant unintentional weight loss

    Weight loss alongside oral symptoms, especially with difficulty swallowing, should prompt wider assessment.

  • Lesion resistant to treatment

    Erosive disease that fails to improve after an adequate trial of topical therapy needs specialist reassessment and often re-biopsy.

  • New lesion in a high-risk patient

    Smokers, heavy drinkers and those with betel quid use carry higher malignancy risk and warrant a lower threshold for biopsy.

Living with it

A manageable condition, with a clear routine.

Four things that make the biggest difference day to day - gentle hygiene, avoiding food triggers, expecting some fluctuation, and keeping surveillance appointments.

A quiet reminder

A flare isn’t a failure - it’s a pattern of this condition.

Steady, gentle habits kept up over months matter far more than reacting hard to any single bad week.

  1. 01 Routine

    Keep oral hygiene gentle but thorough

    A soft brush, non-foaming toothpaste and regular flossing keep the gums calm without irritating fragile mucosa.

  2. 02 Diet

    Sidestep the obvious triggers

    Spicy, acidic, very hot or crunchy foods commonly flare symptoms - swapping them out during active phases helps a great deal.

  3. 03 Patience

    Expect a fluctuating course

    Oral lichen planus tends to wax and wane over months to years - flares don’t always mean treatment has failed.

  4. 04 Review

    Keep annual surveillance appointments

    Regular specialist checks catch any change early, which is exactly what the small malignancy risk calls for.

Frequently asked

Everything we get asked about oral lichen planus.

Quick answers on diagnosis, biopsy, treatment and long-term monitoring.

  • What is oral lichen planus?

    A chronic inflammatory condition of the mouth lining, thought to be driven by a T-cell mediated autoimmune process. It can appear as lacy white patches, red atrophic areas, or painful erosions, and can occur with or without lichen planus on the skin.

  • Is oral lichen planus contagious?

    No. It is an autoimmune-type inflammatory condition, not an infection, so it cannot be passed to another person through kissing, sharing utensils or close contact.

  • Why do I need a biopsy?

    A biopsy confirms the diagnosis and, importantly, checks for dysplasia or early malignant change. It is particularly recommended for erosive, atrophic or persistent lesions rather than mild, asymptomatic reticular disease.

  • Can oral lichen planus turn into cancer?

    There is a small but recognised long-term increased risk of oral squamous cell carcinoma, especially with erosive or atrophic disease. This is why regular specialist surveillance, typically annual, is part of standard care.

  • What treatments actually help?

    Topical corticosteroids are first-line for symptomatic disease. Topical calcineurin inhibitors are a useful steroid-sparing alternative, and addressing any dental material or medication trigger can also make a real difference.

  • Could this be a reaction to my fillings instead?

    Possibly - a lichenoid reaction to a dental material, most often amalgam, can look very similar to oral lichen planus but is typically confined to the area touching the material. Patch testing and a trial change of material can help distinguish the two.

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