Signs and Symptoms
Skin: Itchy, purplish, polygonal bumps, often on inner wrists, ankles, or lower back, that can form scaly plaques.
Mouth (Oral LP): Lacy white patches (Wickham's striae) or painful red sores/erosions.
Nails: Thinning, grooves, ridges, darkening, or loss of nails.
Genitals: Sores or irritation.
Hair: Scalp involvement can cause hair loss.
Causes & Triggers
Immune Response: The body's T-cells mistakenly attack skin and mucous membrane cells.
Unknown Triggers: The specific trigger for this immune response is unknown, but it's linked to genetics and stress.
Associated Factors: Sometimes linked to Hepatitis C infection or reactions to certain medications/chemicals.
Types of Lichen Planus
Reticular: Lacy white patches in the mouth (most common, often no symptoms).
Erosive: Red, painful sores in the mouth or genitals (more severe).
Inverse: In skin folds (armpits, groin).
Hypertrophic: Thickened, raised, itchy plaques.
Treatment & Management
Mild Cases: Often need no treatment, but moisturizers and antihistamines help itching.
Moderate to Severe: Topical corticosteroids, phototherapy, or systemic drugs (corticosteroids, immunosuppressants).
Oral LP: Requires monitoring, especially erosive types, due to potential oral cancer risk.
Prognosis