Scarring Alopecia: Why Some Hair Loss Is Permanent and When to Act Early

What scarring alopecia means and how it differs from non-scarring types

Scarring alopecia, also called cicatricial alopecia, is hair loss caused by destruction of the hair follicles. The follicles are replaced by scar tissue, so hair cannot grow back in the affected areas. This is the key difference from the far more common non-scarring forms of hair loss, in which the follicle is not destroyed and hair may regrow.

In most types of scarring alopecia, inflammation targets the hair follicle. The damage typically occurs around the bulge, the middle region of the follicle that holds the stem cells and oil glands needed for new hair growth. When that region is injured and fibrosis, or scar tissue, forms, the follicle loses its ability to produce a new hair.

Scarring alopecia can be primary or secondary. Primary forms, such as lichen planopilaris, frontal fibrosing alopecia and central centrifugal cicatricial alopecia, are driven by inflammation directed at the follicle itself. Secondary forms develop after an outside injury to the scalp, such as radiation, burns or trauma.

Scarring alopecia is not contagious and cannot be spread from person to person. It can affect any part of the body that has hair, but it most commonly affects the scalp. It accounts for roughly 7% of people who see healthcare providers about hair loss, making it much less common than non-scarring alopecia.

• Cicatricial alopecia is the medical synonym for scarring alopecia.
• The follicle is destroyed and replaced by scar tissue, so loss in that spot is permanent.
• Non-scarring hair loss leaves the follicle intact, so hair may return.
• Primary scarring alopecia is inflammatory; secondary scarring alopecia follows injury such as radiation, burns or trauma.

Sources: Cleveland Clinic, Johns Hopkins University (Pure research repository; chapter in Procedures in Cosmetic Dermatology: Hair Restoration, Elsevier), Indiana University School of Medicine, Department of Dermatology (dermatrials.medicine.iu.edu), Connolly Dermatology (board-certified dermatology practice)

Common forms and their typical scalp appearance

Scarring alopecia usually appears as one or more bald patches on the scalp where hair normally grows, and the skin in those areas tends to look smooth and shiny. Along with the hair loss, people may notice scalp redness, flaking or scaling, blisters, pustules, crusting, itching, burning, tenderness or pain in the affected area. Not everyone has these symptoms.

The subtypes differ in where they begin and how they behave.

Central centrifugal cicatricial alopecia begins at the vertex, or crown, and expands outward, creating an enlarging zone of permanent hair loss. Early disease can be subtle and asymptomatic, so it is often not identified until significant scarring has occurred. It is the most common type of hair loss in Black women.

Frontal fibrosing alopecia is a scarring form that causes slowly progressive recession of the frontal and temporal hairline, often with eyebrow and eyelash loss, and is considered a variant of lichen planopilaris. Lichen planopilaris itself can cause multifocal patchy scarring hair loss, often with perifollicular redness and scale and symptoms such as itching, pain or burning.

Folliculitis decalvans may produce pustules, crusting and tenderness along with a characteristic tufting of multiple hairs emerging from a single opening. Discoid lupus erythematosus of the scalp can cause lesions with inflammation, scale and pigment change, followed by atrophy and scarring. Scarring alopecia can also involve hair-bearing areas beyond the scalp, including the eyebrows and beard area.

Anyone can develop scarring alopecia, though it tends to affect adults more than children. Some types are more common in particular groups, as with central centrifugal cicatricial alopecia in Black women. It is also possible to have a scarring condition alongside a non-scarring one such as androgenetic alopecia, which may need its own treatment plan.

• Smooth, shiny bald patches are a classic appearance.
• Central centrifugal cicatricial alopecia: starts at the crown and spreads outward.
• Frontal fibrosing alopecia: hairline and eyebrow recession, often in a band-like pattern.
• Lichen planopilaris: scattered patches with perifollicular redness and scale.
• Folliculitis decalvans: pustules, crusting and tufted hairs.
• Discoid lupus erythematosus: inflamed, scaly scalp lesions that later scar.

Sources: Cleveland Clinic, Connolly Dermatology (board-certified dermatology practice), Dermatology Circle (Viktoryia Kazlouskaya, MD, PhD; New York City), MetroBoston Clinical Partners

Symptoms that should prompt urgent evaluation

A single bald patch on its own does not confirm scarring alopecia, and the following signs are not a validated screening tool. They are reasons to seek professional evaluation promptly, because an accurate diagnosis requires examination and sometimes a biopsy.

Symptoms alone do not always measure disease activity. Some cicatricial alopecias can progress without prominent symptoms, and a quiet scalp does not rule out ongoing follicular damage. That is why visible change matters as much as how the scalp feels.

Scarring alopecia can also resemble dandruff or psoriasis, since it may involve scalp redness, flaking, scaling or pustules. Distinguishing these conditions may require a clinical evaluation rather than a self-diagnosis based on appearance.

• Hair loss that keeps expanding or new patches appearing
• Burning, tenderness or pain in the scalp
• Perifollicular scale or redness around the hair openings
• Pustules, crusting or drainage
• Recession of the hairline or loss of eyebrow hair
• Smooth, shiny patches where hair no longer grows

Sources: Cleveland Clinic, Dermatology Circle (Viktoryia Kazlouskaya, MD, PhD; New York City), MetroBoston Clinical Partners

Why early diagnosis affects outcomes

There is no cure for scarring alopecia. Treatment aims to manage symptoms, reduce inflammation and slow or stop further hair loss. Once a follicle is completely destroyed and replaced by established scar tissue, treatment cannot recreate that follicle, so the greatest clinical opportunity is to control inflammation before additional follicles are permanently damaged.

That window matters because of how the condition is staged. When a biopsy shows scar tissue but no inflammatory cells, providers may call this end-stage scarring alopecia, meaning the condition is past the point of active inflammation and treatment may be less effective.

The speed of progression varies. Focal hair loss in patches may develop slowly over several years or start suddenly and worsen rapidly. Because symptoms alone do not always reflect activity, waiting for discomfort to become severe is not a reliable strategy.

A hair transplant is usually not a good treatment for people with active scarring alopecia, because scar tissue under the skin can prevent transferred hair from growing. It may be considered if a person has not lost new hair for a few years. A dermatologist experienced in hair loss is best positioned to make that judgment.

Sources: Cleveland Clinic, Johns Hopkins University (Pure research repository; chapter in Procedures in Cosmetic Dermatology: Hair Restoration, Elsevier), Dermatology Circle (Viktoryia Kazlouskaya, MD, PhD; New York City)

How clinicians distinguish scarring from non-scarring hair loss

A dermatologist (a physician who specializes in skin disorders) diagnoses scarring alopecia. Because the condition can be difficult to diagnose and mimics other scalp problems, seeing a dermatologist with experience in hair loss is important.

Evaluation usually combines a focused history, scalp examination and magnified scalp examination, called trichoscopy. Trichoscopy can help identify features such as reduced or absent follicular openings and perifollicular redness or scale, and can help distinguish active disease from established scarring.

A scalp biopsy is used to help diagnose scarring alopecia by detecting inflammation, the type of damage, and whether hair follicles have been permanently destroyed. In selected cases, a biopsy taken from an active or transitional margin may provide more useful information about the underlying inflammatory process than a sample from a completely scarred area, which may show only final structural damage.

Because a scarring condition can coexist with a non-scarring one such as androgenetic alopecia, the evaluation may identify more than one diagnosis, each with its own treatment plan.

Chemotherapy does not cause scarring alopecia, because chemotherapy drugs cause hair to fall out without destroying the follicle. Radiation therapy, by contrast, can cause secondary scarring alopecia when burns permanently destroy hair follicles.

Sources: Cleveland Clinic, Johns Hopkins University (Pure research repository; chapter in Procedures in Cosmetic Dermatology: Hair Restoration, Elsevier), Indiana University School of Medicine, Department of Dermatology (dermatrials.medicine.iu.edu), Dermatology Circle (Viktoryia Kazlouskaya, MD, PhD; New York City), MetroBoston Clinical Partners

General treatment categories and the limits of self-care

Treatment for scarring alopecia is medical rather than cosmetic. Topical and intralesional corticosteroids are the preferred first-line options for primary scarring alopecia, and other options include systemic anti-inflammatory or immunosuppressant medications such as hydroxychloroquine, as well as surgical hair transplantation, platelet-rich plasma and low-level light therapy in selected cases.

Timelines are typically measured in months, not days. Many people take medication for about six to 12 months until symptoms improve and hair loss slows or stops, and medication may need to be restarted if hair loss increases again. Duration varies by subtype and by how the individual responds.

Self-care has clear limits here. No shampoo, oil, supplement or styling change can regrow hair from a follicle that has been destroyed. Over-the-counter products may soothe the scalp, but they do not control the inflammation that drives follicular damage, and treating a scarring alopecia as ordinary dandruff can delay diagnosis and allow further permanent loss.

Because dosing, contraindications and candidacy for procedures depend on the subtype, the extent of disease and the person's overall health, treatment decisions belong with a qualified clinician. This overview describes categories of care, not an individual plan.

Sources: Cleveland Clinic, Johns Hopkins University (Pure research repository; chapter in Procedures in Cosmetic Dermatology: Hair Restoration, Elsevier), Dermatology Circle (Viktoryia Kazlouskaya, MD, PhD; New York City), MetroBoston Clinical Partners