Lichen Planus

🌿 Overview

Lichen planus is an inflammatory condition, thought to involve the immune systemYour body's built-in defense team that fights off germs and helps you heal. More →, that causes itchy, purplish, flat-topped bumps on the skin or lacy white patches and sores in the mouth. It often clears on its own over months to a couple of years; care soothes the itch and inflammationThe body's natural response to injury — like redness, swelling, or heat around a sore spot. More →, with prescription treatment for more troublesome cases.

On the skin, it appears as shiny, flat-topped, purplish, very itchy bumps, often on the wrists, ankles, and lower back, sometimes with fine white lines on the surface. In the mouth it shows as lacy white patches or, less often, painful sores; it can also affect the nails, scalp, or genitals. The exact cause isn't fully known but involves an immune reaction, sometimes triggered by certain medications, infections (like hepatitis C), or contact allergies.

Many cases resolve on their own, so care focuses on calming the itch and inflammationThe body's natural response to injury — like redness, swelling, or heat around a sore spot. More →: soothing oatmeal baths, cool compresses, gentle moisturizers, and avoiding scratching and known irritants. A doctor may prescribe steroid creams or other treatments for stubborn or widespread disease, and oral or genital lichen planus warrants medical follow-up, partly to monitor the small long-term risks. Persistent mouth sores should always be evaluated.

Common signs

• Itchy, shiny, flat-topped, purplish bumps (often on wrists, ankles, lower back)
• Fine white lines on the surface of the bumps
• Lacy white patches or sores inside the mouth
• Sometimes nail changes or scalp involvement

🔎 Why it happens

Common causes and triggers — spotting yours is often the first step to relief.

• An immune-mediated inflammatory reaction (exact trigger often unknown)
• Sometimes certain medications or contact allergens
• Associated with some infections (such as hepatitis C)
• Not contagious

✅ What to do

Gentle, practical steps you can take at home — start at the top.

1. Soothe the itch with cool oatmeal baths, cool compresses, and gentle moisturizers; avoid scratching.
2. Avoid known irritants and triggers; for mouth lichen planus, avoid spicy, acidic, and rough foods and keep good oral hygiene.
3. Use gentle, fragrance-free skin care, and manage stress, which can aggravate flares.
4. See a doctor to confirm the diagnosis and for prescription treatment of stubborn, widespread, oral, or genital cases.

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🍽️ Eating to help

Food is one of the gentlest medicines — small, steady changes help most.

Favor these

• Cool, soft, bland foods if the mouth is involved; an anti-inflammatory whole-food diet

Go easy on

• Spicy, acidic, and rough foods with mouth involvement

Avoiding mouth irritants helps oral lichen planus; gentle skin care helps skin lesions.

📜 A note from history

Described over a century ago, lichen planus highlighted the skin's immune reactions and the value of gentle, soothing care.

📚 Learn more

Trusted, independent sources for further reading. These open in a new tab.

• Lichen planus — Wikipedia ↗

💬 Ask Remy about Lichen Planus