Lichen planopilaris (LPP) is a type of inflammatory scalp condition that destroys hair follicles and causes patches of permanent hair loss. It is the leading cause of scarring alopecia, a category of hair loss where scar tissue replaces the follicle itself, preventing regrowth. LPP most commonly affects women in their 50s and 60s, though it can appear as early as the mid-20s.
How LPP Damages Hair Follicles
LPP is driven by an overactive immune response. Certain immune cells, particularly a group of white blood cells called T cells, mistakenly attack a specific part of the hair follicle known as the bulge region. This area houses the stem cells responsible for regenerating hair. When those stem cells are destroyed by inflammation, the follicle can no longer produce hair, and scar tissue forms in its place.
This is what makes LPP different from more common types of hair loss like androgenetic thinning or alopecia areata. In those conditions, the follicle remains intact and regrowth is possible. With LPP, once a follicle scars over, the hair loss in that spot is permanent. That’s why early detection matters: treatment can slow or stop the inflammation, but it cannot reverse damage already done.
Who Gets LPP
LPP disproportionately affects women. In a Mayo Clinic survey of 129 patients with confirmed LPP, nearly 89% were female. The median age at diagnosis was 58, with most patients reporting symptoms beginning in their 50s or 60s. Caucasian women appear to be the most frequently affected group, though LPP occurs across all ethnicities. The condition is relatively uncommon overall, which can make getting a correct diagnosis slower than patients would like.
Symptoms to Recognize
The earliest signs of LPP are often easy to dismiss or confuse with dandruff or general scalp irritation. Common symptoms include:
- Scalp itching, burning, or pain in patches, sometimes before visible hair loss appears
- Bald patches that look smooth or shiny, with no visible follicle openings
- Redness or scaling around the base of remaining hairs, especially at the edges of bald areas
The hair loss typically starts in scattered patches on the top or sides of the scalp. Some people notice clumps of hair coming out more easily than normal, particularly during washing or brushing. The affected areas may feel tender to the touch.
Three Clinical Variants
LPP actually exists on a spectrum with three recognized forms, each distinguished by where and how the hair loss occurs.
Classical LPP is the most commonly discussed form, producing irregular bald patches across the scalp. Frontal fibrosing alopecia (FFA) causes the hairline to slowly recede backward in a band-like pattern, often affecting the eyebrows and body hair as well. FFA has become increasingly common over the past two decades, particularly in postmenopausal women. The third variant, Graham-Little-Piccardi-Lassueur syndrome, is rare and involves scarring hair loss on the scalp combined with non-scarring hair loss in the armpits and pubic area, along with tiny bumps on the trunk or limbs.
All three share the same underlying mechanism of immune-driven follicle destruction. They are treated similarly, but the pattern of hair loss can help a dermatologist determine which variant is involved.
How LPP Is Diagnosed
A dermatologist will usually start by examining the scalp closely, often with a dermatoscope (a magnifying tool with built-in lighting). Key visual clues include redness around individual follicles, scaling at the follicle openings, and a pattern called “tufting,” where several hairs emerge from a single opening because neighboring follicles have scarred together.
A scalp biopsy is typically needed to confirm the diagnosis. Under a microscope, LPP shows a characteristic pattern: inflammation clustered around the upper portion of the hair follicle, with a specific type of scarring called perifollicular mucinous fibroplasia. The biopsy also helps rule out other conditions that can look similar, such as discoid lupus or central centrifugal alopecia.
Tracking Disease Activity
Because LPP can alternate between active flares and quieter periods, dermatologists use a scoring tool called the Lichen Planopilaris Activity Index (LPPAI) to monitor the condition over time. The score, ranging from 0 to 10, weighs four components: symptoms like itching, pain, and burning (30% of the score); visible signs like redness and scaling (30%); how easily hairs pull out during a gentle tug test (25%); and whether the affected area is spreading (15%).
This scoring helps guide treatment decisions. A high LPPAI suggests active inflammation that needs more aggressive management, while a low score may indicate the disease is relatively stable. Patients are typically re-evaluated at regular intervals to see whether treatment is working.
Treatment Goals and What to Expect
The primary goal of treating LPP is to stop further hair loss by calming the immune attack on hair follicles. Hair that has already been lost to scarring will not grow back, so treatment is focused entirely on protecting the follicles that remain.
Most treatment plans involve reducing scalp inflammation through topical or oral medications that suppress the overactive immune response. The specific approach depends on how active and widespread the disease is. Mild cases may respond to topical treatments applied directly to the scalp, while more active or spreading disease often requires systemic therapy. Response times vary, but it can take several months to see a meaningful reduction in symptoms and disease activity.
For patients who have stable, burned-out disease (meaning inflammation has stopped but hair loss has already occurred), hair transplantation is sometimes considered. However, success rates are variable because transplanted follicles can be attacked by the same immune process if the disease reactivates. This option works best when the condition has been inactive for an extended period.
Living With LPP
Beyond the physical symptoms, LPP carries a significant emotional burden. Visible hair loss on the scalp affects self-image and confidence, and the knowledge that lost hair won’t return can be distressing. Many patients find it helpful to connect with support communities, either online or through dermatology clinics that specialize in hair loss.
Practically, gentle scalp care can help reduce irritation. Avoiding harsh chemical treatments, excessive heat styling, and tight hairstyles that pull on remaining hair is generally recommended. Some patients use scalp concealers, wigs, or scarves while managing the condition. Regular follow-up with a dermatologist experienced in scarring alopecia is important, since catching a flare early gives the best chance of preserving hair.