Most hair loss is reversible or at least manageable: shedding after stress, thinning from genetics, or patchy loss from alopecia areata usually leaves the hair follicle alive. A smaller group of conditions works differently. In scarring alopecia (also called cicatricial alopecia), inflammation destroys the follicle and replaces it with scar tissue. Once that happens, hair in that spot does not come back. That is why recognizing the early warning signs, and getting a proper diagnosis quickly, matters so much.
This guide focuses on the two most common forms seen in dermatology clinics, lichen planopilaris (LPP) and its variant frontal fibrosing alopecia (FFA), and explains what they look like, how they are diagnosed and what treatment aims to do.
What Is Scarring Alopecia?
Every hair grows from a follicle that contains stem cells near its upper portion (the bulge). These cells allow a follicle to regrow hair cycle after cycle. In scarring alopecias, an immune-driven inflammation targets that upper part of the follicle. Over time, the follicle is destroyed and replaced by fibrous tissue. On the scalp surface, the result is smooth, shiny skin where the follicle openings have disappeared.
Dermatologists group scarring alopecias by the type of inflammatory cell involved. LPP and FFA are "lymphocytic" types. Others include central centrifugal cicatricial alopecia (CCCA), which typically starts at the crown, and discoid lupus. Because they can look similar to more common types of hair loss early on, scarring alopecias are often missed until a noticeable area has already been lost.
Lichen Planopilaris (LPP)
Lichen planopilaris is considered a follicular form of lichen planus, an inflammatory condition that can also affect the skin, nails and mouth. It most often appears in adults in midlife and is more common in women, though men are affected too.
Common signs of LPP
- Itching, burning or tenderness of the scalp, sometimes before any hair loss is noticed
- Redness and scaling around individual hairs (perifollicular erythema and scale), often visible right at the base of the hair shaft
- Irregular patches of thinning, frequently on the top or crown of the scalp
- Shiny, smooth areas where hair openings are no longer visible
- Hairs that pull out easily at the edge of active areas
Frontal Fibrosing Alopecia (FFA)
Frontal fibrosing alopecia is now viewed as a variant of LPP with a distinct pattern. It most commonly affects postmenopausal women, although it is increasingly recognized in younger women and in men. Reports of FFA have risen noticeably over the past two decades, and researchers are still investigating why.
Common signs of FFA
- A slowly receding band along the front and sides of the hairline, often symmetrical
- Eyebrow thinning or loss, which sometimes appears before scalp changes
- A pale, smooth strip of skin between the old hairline and the current one
- Isolated "lonely hairs" left standing in the receded zone
- Possible involvement of body hair, small skin-colored bumps on the face, or skin discoloration
Because FFA moves the hairline back, it is sometimes mistaken for female or male pattern hair loss. The eyebrow loss, the smooth skin and the redness or scale around hairs at the margin are clues that point toward FFA instead.
How Scarring Alopecia Is Diagnosed
There is no blood test for LPP or FFA. Diagnosis rests on a dermatologist's examination and, usually, a biopsy.
- History and symptoms. Your doctor will ask when the loss started, whether it itches or burns, and about eyebrow or body hair changes and other skin conditions.
- Trichoscopy. A handheld magnifier (dermatoscope) shows details invisible to the naked eye: missing follicle openings, scale wrapping around hairs and redness at the base of hairs.
- Scalp biopsy. A small sample taken from an active edge confirms the diagnosis by showing inflammation around the follicle and early scarring. This is considered the standard for a definitive answer.
One important point from the research: inflammation in the follicle can be more active than the scalp surface suggests. Mild symptoms do not always mean mild disease, which is another reason not to wait.
What Treatment Aims to Do
The honest goal of treatment for scarring alopecia is to stop or slow further loss and to calm symptoms such as itching and burning. Hair in fully scarred areas is generally not expected to return. There are no universally agreed guidelines yet, and much of the evidence comes from smaller studies, so treatment is tailored by a dermatologist.
Options your dermatologist may discuss include:
- Topical or injected corticosteroids to reduce inflammation in localized areas
- Oral anti-inflammatory or immune-modulating medicines, such as hydroxychloroquine or doxycycline, for more active or widespread disease
- 5-alpha-reductase inhibitors (such as finasteride or dutasteride), which some specialists use for FFA
- Topical calcineurin inhibitors, mainly for symptom relief
- Newer approaches under study, including JAK inhibitors, for difficult cases
FFA can also stabilize on its own, which makes it harder to judge how well a specific treatment works. Regular follow-up with photos and measurements of the hairline helps track progress. Once the condition has been inactive for a long period, some people explore cosmetic options such as hair transplantation, though results in scarred skin are less predictable and should be discussed with an experienced surgeon.
When to See a Doctor
Book an appointment with a board-certified dermatologist promptly if you notice:
- Hair loss that comes with itching, burning, pain or tenderness
- Redness or scale clustered around individual hairs
- A hairline that is moving back along with eyebrow thinning
- Smooth, shiny patches where hair used to grow
- Patchy loss that keeps spreading
Note that over-the-counter minoxidil labeling advises against use when hair loss is sudden or patchy, or when the scalp is red, inflamed or painful. Those are exactly the situations that call for a medical evaluation first.
Caring for a Sensitive Scalp
While medical treatment does the heavy lifting, everyday habits can help keep an irritated scalp comfortable. Wash with lukewarm rather than hot water, avoid tight hairstyles and harsh chemical treatments, limit heat styling, and choose gentle, fragrance-light products. Protect your scalp and hairline from strong sun, and avoid scratching active areas.
If you are looking for a gentle everyday cleanser, Regenepure NT Nourishing Treatment Shampoo is formulated to cleanse the hair and scalp without sulfates. Shampoo is a cosmetic part of your routine and is not a treatment for scarring alopecia, so ask your dermatologist which products suit your scalp while you are under care.
The Bottom Line
Lichen planopilaris and frontal fibrosing alopecia are uncommon, but they are important to catch early because the hair lost to scarring is permanent. Symptoms like itching or burning, redness around hairs, eyebrow loss or a steadily receding hairline deserve a dermatologist's attention. With early diagnosis and consistent treatment, many people are able to slow the condition and protect the hair they have.
This article is for general educational purposes and is not medical advice. Talk with a doctor or dermatologist about diagnosis and treatment.