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Lichen Planus
Mild
Lichen planus is an inflammatory condition that can affect the skin, mouth, nails, scalp, or genital areas. It often causes small, itchy, or painful lesions that may appear suddenly or develop gradually. The condition is not contagious and may persist for months or longer. The appearance of lichen planus varies depending on the body area involved. Skin lesions are often purplish, flat-topped, and intensely itchy, while lesions inside the mouth may appear as white lines or patches and can sometimes be painful. Nail, scalp, or genital involvement can require additional assessment. Symptoms may improve over time but can recur.
Body System
Skin Hair & Nails
When to Seek Medical Attention
Lichen planus is usually not an emergency but should be assessed when symptoms persist or are extensive. Seek medical care for painful or widespread skin lesions, significant mouth or genital involvement, difficulty eating or drinking, or worsening symptoms. Prompt evaluation is appropriate for rapidly changing lesions or signs of infection.
Symptoms
2
Causes
2
Treatments
5
Diet
3
Overview
Lichen planus is an inflammatory condition that can affect the skin, mouth, nails, scalp, or genital areas. It often causes small, itchy, or painful lesions that may appear suddenly or develop gradually. The condition is not contagious and may persist for months or longer. The appearance of lichen planus varies depending on the body area involved. Skin lesions are often purplish, flat-topped, and intensely itchy, while lesions inside the mouth may appear as white lines or patches and can sometimes be painful. Nail, scalp, or genital involvement can require additional assessment. Symptoms may improve over time but can recur.
Symptoms 2
Blisters
Brittle Nails
Causes 2
The exact cause of lichen planus is not fully understood. It appears to involve an abnormal immune response in which immune cells attack cells in the skin or mucous membranes. Certain medicines, infections, allergens, or other triggers may cause similar lichen planus-like reactions in some people. Lichen planus is thought to result from immune-mediated damage to cells in the outer layers of the skin or mucous membranes. The reason this immune response begins is often unclear. Medication-related eruptions can resemble lichen planus, and infections or other immune triggers may be associated with some cases. Different affected sites may have different appearances.
Autoimmune Disorder
Stress
Risk Factors
Risk factors for lichen planus may include certain medications, hepatitis C infection, immune-system abnormalities, and other triggers. It can occur at any age but is more common in adults. Some people may also develop the condition after exposure to specific substances or treatments. Some people with lichen planus have associated autoimmune or inflammatory conditions. Certain medicines can produce lichenoid reactions, and hepatitis C has been associated with the condition in some populations. Oral disease may be influenced by local irritation, dental materials, tobacco exposure, or other factors, although these associations do not mean that they cause every case.
Diagnosis
Diagnosis is based on a patient's medical history,
symptoms, physical examination and, when necessary,
laboratory or imaging investigations.
Diagnosis is based on the appearance and location of the lesions and the medical history. A healthcare professional may examine the skin, mouth, nails, or other affected areas. A skin biopsy may be performed when the diagnosis is uncertain or another condition needs to be excluded. A clinician may inspect the distribution, color, shape, and surface of lesions and ask about medications and associated symptoms. Oral lesions may require examination of the gums, cheeks, tongue, and other mucosal surfaces. Biopsy findings can support the diagnosis when clinical features are atypical.
Prevention
Key Prevention Tips
There is no guaranteed way to prevent lichen planus because its exact cause is uncertain
Avoiding known triggers or medicines that have previously caused reactions may reduce recurrence in some people
Regular dental care and avoidance of irritating oral products can help when the mouth is affected
Prevention is mainly focused on reducing known aggravating factors because the underlying cause is uncertain
People who develop lichenoid reactions after a medication should discuss alternatives with their healthcare professional rather than stopping prescribed treatment independently
Gentle skin and oral care can reduce irritation in affected areas
Prevention Guidance
There is no guaranteed way to prevent lichen planus because its exact cause is uncertain. Avoiding known triggers or medicines that have previously caused reactions may reduce recurrence in some people. Regular dental care and avoidance of irritating oral products can help when the mouth is affected. Prevention is mainly focused on reducing known aggravating factors because the underlying cause is uncertain. People who develop lichenoid reactions after a medication should discuss alternatives with their healthcare professional rather than stopping prescribed treatment independently. Gentle skin and oral care can reduce irritation in affected areas.
Reminder: Prevention recommendations should be tailored to your personal health status and risk factors.
Treatment & Management 5
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Medical Note: The treatment information provided is intended for educational purposes only.
Always consult a qualified healthcare professional before starting,
stopping, or changing any treatment.
Diet & Nutrition 3
Recommended Foods
Fresh Fruits
Provide antioxidants
Vegetables
Support immune health
Omega-3 Foods
May reduce inflammation
Foods to Avoid
Processed Foods
May worsen inflammation
Alcohol
Limit intake
Medical Nutrition Note: Diet recommendations are intended for general educational purposes and should be tailored to individual health needs by a qualified healthcare professional.
Frequently Asked Questions 5
An inflammatory condition affecting skin and mucous membranes.
The exact cause is unknown but immune dysfunction is involved.
No, lichen planus is not contagious.
Yes, stress may worsen symptoms.
Treatment helps control symptoms and inflammation.
Helpful Tip: These answers provide general medical information.
Consult your healthcare provider for advice tailored to your condition.