Lichen planus is a chronic recurrent rash that occurs due to inflammation of your skin and mucous membranes. On the skin, the rash is characterized by small, purplish, often itchy, flat-topped, many-sided (polygonal) bumps that can grow together into rough, scaly plaques on the skin.
Mouth, vagina, and other areas covered by a mucous membrane are the most commonly affected areas of lichen planus inflammation. Lichen planus forms lacy white patches, sometimes with painful sores.
It affects about one in one hundred people worldwide, mostly affecting adults over the age of 40 years.
About half those affected have oral lichen planus, which is more common in women than in men and about 10% of the population have lichen planus of the nails. It is a T cell-mediated autoimmune disease, in which inflammatory cells attack a protein present in the skin and mucosal keratinocytes.
The reason for this abnormal immune response is unknown. Lichen planus is not contagious thus, you cannot get this disease from someone else and cannot give it to anyone. Lichen planus is not a type of cancer.
The symptoms of lichen planus vary depending on the areas affected.
The common symptoms are:
Purplish-colored lesions or flat-topped bumps on your skin or genitals
Itching blisters occurring mostly on the inner forearm, wrist or ankle, but sometimes on the external genitals
White spots or patches in the mouth — inside the cheeks or on the gums, lips or tongue
Your doctor or dermatologist will perform a physical examination to diagnose lichen planus. To confirm the diagnosis, he may perform:
Biopsy: During a punch biopsy test, your doctor removes a small section of your skin, which is then examined under a microscope for cell patterns characteristic of lichen planus. You'll receive a local anesthetic to numb the site and likely require stitches to close the wound.
Hepatitis C tests: a small sample of blood for a lab test to determine if you have hepatitis C, a possible trigger for lichen planus.
Allergy tests: Your doctor may refer you to an allergy specialist (allergist) to determine whether substances you regularly have contact with may be causing you to have allergic reactions that act as triggers for your condition.
In mild cases of lichen planus, the patient may become normal within weeks or months with local treatments for symptomatic cutaneous or mucosal disease.
In severe cases, there is no permanent cure for lichen planus but medications could help treating the symptoms and in some cases to target a possible underlying cause. Medications that are often prescribed include:
Retinoids, which are related to vitamin A and are taken topically or orally
Corticosteroids reduce inflammation and can be topical, oral, or given as an injection
Antihistamines reduce inflammation and may be particularly helpful if your rash is triggered by an allergen
Nonsteroidal creams are applied topically and can suppress your immune system and help clear up the rash
There are no known measures for preventing lichen planus but avoiding certain chemicals and medications may reduce flare-ups in some patients with this disorder.
7 Alternative and Homeopathic Remedies
Following alternative remedies used for lichen planus are effective, but make sure to consult your doctor before following them:
Soaking in an oatmeal bath
Applying cool compresses to the rash
Aloe vera gel
Sulphur mineral baths
Vitamin supplements A diet rich in fruit and vegetables
Oral and topical herbal medications
Cod liver oil supplements
Using OTC anti-itch creams
Adding a source of vitamins A, D and an OTC product for your treatment.
8 Risks and Complications
There are several risks associated with lichen planus.
Anyone can develop lichen planus, but the condition most often affects middle-aged adults.
Lichen planus can be difficult to treat if it develops on your vagina or vulva. This can lead to pain, scarring, and discomfort during sex.
There is some evidence that lichen planus may increase your risk of a skin cancer known as squamous cell carcinoma, though the risk is small. Your doctor may recommend routine screening for evidence of cancerous cells in tissues affected by lichen planus.
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