In short. Cicatricial (scarring) alopecia is a group of conditions in which inflammation destroys hair follicles and scar tissue forms in their place. Lost follicles do not regenerate, so a hair transplant can in principle cover the area, but only when the disease is inactive and the diagnosis is confirmed. If inflammation is ongoing, the new grafts can be damaged as well. That is why the order is diagnosis and control of disease activity first, then a cautious test transplant, rather than a full procedure right away.
Most people with hair loss have androgenic or telogen alopecia, where the follicle stays alive and is “dormant.” Cicatricial alopecia works differently: the follicle does not simply weaken, it is destroyed. This is what makes it a separate and far more complex topic than ordinary balding.
Below we explain what happens to the scalp, how doctors tell an active form from a “burned-out” one, when a transplant is possible, and why no honest specialist will promise a guaranteed result here.
What cicatricial alopecia is and how it differs from other types
In cicatricial (scarring) alopecia, an immune or inflammatory reaction attacks the area around the follicle, including the region where the stem cells of the hair bulb live. When these cells die, connective tissue replaces the follicle. The skin in these areas is usually smooth and shiny, with no visible follicular openings. A general overview of this group of conditions is available on the page about cicatricial alopecia.
The key difference from androgenic alopecia is simple: in androgenic alopecia, follicles miniaturize but remain, and they can be supported with therapy. In cicatricial alopecia, a lost follicle cannot be brought back by any means. Treatment then has a single goal: to stop the inflammation so that the remaining follicles are not lost.
Another feature is the symptoms. Itching, burning, tenderness, scaling, or redness around the hairs often appear. But in some people the process is silent, with no complaints, and becomes noticeable only when a bald patch has already formed. That is why seeing a trichologist early is especially important here.
The main types and why it matters to tell them apart
Cicatricial alopecias are divided into primary, where destruction of the follicle is the disease itself, and secondary, where the scar results from external injury. Primary forms are in turn classified by the type of inflammatory cells involved. To understand the topic, it is enough to know a few of the most common forms.
- Lichen planopilaris: inflammation around the follicles, scaling, and itching; patches are usually irregular and gradually enlarge.
- Frontal fibrosing alopecia: recession of the hairline at the forehead and temples, often together with loss of the eyebrows; more common in postmenopausal women (Vañó-Galván et al., Journal of the American Academy of Dermatology, 2014).
- Discoid lupus erythematosus: reddish plaques with skin atrophy, associated with an autoimmune process.
- Folliculitis decalvans: pustular eruptions and tufts of several hairs emerging from a single opening; the inflammation is neutrophilic in nature.
- Central centrifugal cicatricial alopecia: thinning that starts at the crown and spreads outward in a circle, more common in women with Afro-textured hair.
Secondary scars after burns, injuries, surgery, or radiation therapy are a separate category. They are stable and have no active inflammation, so the approach to them is different. This is covered in detail in the article on hair transplantation on scars.
The difference between types is not merely academic. It determines the treatment plan, the prognosis, and whether it is appropriate to discuss surgery at all. A diagnostic error can cost months during which the process could still have been stopped.
How the diagnosis is made
Diagnosis begins with an examination and a history: when the first signs appeared, whether there was itching or tenderness, whether there are similar changes on the skin of the body, eyebrows, or nails, and which medications you take. The doctor then performs trichoscopy. Characteristic signs are absent follicular openings, perifollicular redness or scaling, and tufts of hairs emerging from a single opening.
In doubtful cases, a scalp biopsy is needed. A small sample (usually 4 mm) is sent for histology, and the pathologist determines the type of inflammatory infiltrate and the degree of follicle destruction. The biopsy is taken from the active edge of a patch, not from a completely “burned-out” area, because there it is almost uninformative. Blood tests are sometimes added to rule out autoimmune conditions.
It is also important to exclude conditions that only resemble cicatricial alopecia. For example, in alopecia areata the skin in the patches is smooth, yet the follicles are preserved and the hair can regrow. Likewise, trichotillomania or traction damage do not leave a scar in the early stages. Different diagnoses call for different tactics, so no one makes this diagnosis “by eye.”
When a transplant is possible and when it is not
The main condition is stability. A transplant is considered only after the disease has been confirmed and is in remission: no new patches, no active inflammation or symptoms, usually for at least one to two years. The doctor determines the exact period based on the type of disease and trichoscopy findings.
The reason is clear: a graft placed in skin with active inflammation may be attacked by the same process. An additional risk is the so-called Koebner phenomenon, in which skin trauma (and the incision made during a transplant is also trauma) triggers a new flare in susceptible people. That is why an active form is a direct reason to postpone surgery.
The quality of the skin itself is assessed separately. Scar tissue has a poorer blood supply than healthy skin, so graft survival there may be lower and growth less dense. This is a normal biological reason, not a flaw in technique. The donor area is evaluated as carefully as usual: the follicles at the back of the head must be healthy and not involved in the inflammation.
| Situation | Transplant | What is discussed at the consultation |
|---|---|---|
| Active inflammation, itching, scaling, new patches | Not performed | Treatment, monitoring of activity, repeat trichoscopy |
| Diagnosis not confirmed | Not performed | Trichoscopy, biopsy, ruling out other causes |
| Remission for over 1–2 years, diagnosis confirmed | Possible, test first | Test area, maintenance therapy, limited expectations |
| Frontal fibrosing alopecia, long-term remission | Possible with caution | Risk of further hairline recession, a design with a safety margin |
| Secondary scar after injury or surgery | Often possible | Skin condition, blood supply, number of grafts |
| Scalp without follicular openings but with signs of inflammation | Postpone | Choice of therapy, repeat examination in 6–12 months |
Test transplant: how it is done
Even in stable remission, doctors usually do not perform a full procedure right away. Instead, a small number of grafts are placed in one limited area, which is the test zone. The purpose is simple: to find out whether follicles will survive in scar tissue and whether the procedure triggers a new flare.
The result is assessed no earlier than 6–12 months later. Transplanted hair first sprouts after about 3–4 months, but the density and the behavior of the skin become clear only after a year. If the grafts have taken and there are no new signs of inflammation, the doctor will discuss a second stage with you. If survival is poor or symptoms appear, further work is declined, and that too is useful information, not a failure.
What makes this transplant technically different
Transplant density on a scar is usually lower than on healthy skin, and the grafts are spaced more widely so as not to worsen the blood supply. The doctor may use smaller recipient sites and work more gently with each area. As a result, covering a scar takes more time, and the outcome is usually less dense than in a transplant for androgenic alopecia. The goal should be a natural but not “dense” appearance.
Treatment: what to do before and after surgery
A transplant does not treat cicatricial alopecia. It is only a cosmetic correction of an area that has already been lost, while the main work is controlling the inflammation. The regimen is prescribed by a dermatologist or trichologist depending on the form: it may include topical corticosteroids, intralesional injections, anti-inflammatory and immunomodulating drugs, and in some forms antibiotics. A review of therapy options for primary cicatricial alopecias can be found in the work of Harries et al. (British Journal of Dermatology, 2013).
It is important not to self-medicate. Agents used for androgenic alopecia, such as finasteride, do not stop the scarring process, and time may be lost. The same applies to PRP therapy: in cicatricial forms it is not considered a substitute for anti-inflammatory treatment, and the decision about any injections is made only by the doctor.
After a transplant, the patient usually remains under follow-up: periodic trichoscopy, photo documentation, and a prompt response to itching or scaling. If signs of inflammation return, therapy is adjusted before the damage becomes visible.
Risks and realistic expectations
To be honest about the main point: there is no guaranteed result here. Possible complications include poor graft survival, uneven growth, a flare of the underlying disease, and in some people further loss of their own hair next to the transplanted area. This applies especially to frontal fibrosing alopecia, which can progress even after remission.
For this reason, it makes sense to set moderate goals: not to “bring back thick hair,” but to make the area less noticeable. For some patients this is enough, and the result changes how they feel about themselves. For others, better alternatives are camouflage, hairstyling, scalp micropigmentation, or simply observation. All options should be discussed in advance.
The first step is always a trichologist consultation with diagnostics. If surgery then becomes a question, a hair transplant is planned individually and usually begins with a test rather than the full scope.
Frequently asked questions
Can hair be transplanted in cicatricial alopecia?+
Sometimes, but only when the diagnosis is confirmed and the disease is inactive, usually for at least one to two years. The doctor first performs a test transplant on a small area and assesses the result after 6–12 months. If inflammation is ongoing, surgery is postponed.
Will hair regrow on scarred areas on its own?+
No. In cicatricial alopecia the follicle is destroyed and replaced by connective tissue, so your own hair will not regrow there. Treatment aims to preserve the follicles that remain, and the lost area can only be covered with a transplant or camouflage.
How can cicatricial alopecia be told apart from alopecia areata?+
In alopecia areata the skin in the patches is usually smooth, but the follicles are preserved and the hair can regrow. In cicatricial alopecia, trichoscopy shows no follicular openings, and scaling, redness, or itching are common. Only a doctor can tell them apart reliably, using trichoscopy and sometimes a biopsy.
How long should I wait after the disease stabilizes before a transplant?+
There is no single universal figure; it depends on the form. Usually the benchmark is remission for at least one to two years with no new patches, no complaints, and no signs of inflammation on trichoscopy. The doctor determines the period individually.
Can a transplant trigger a flare?+
Yes, in susceptible people skin trauma can provoke new inflammation. This is called the Koebner phenomenon. That is why a small test is done first, and after surgery you remain under follow-up so that itching, scaling, or redness can be addressed quickly.
Do grafts survive on a scar the same way as on healthy skin?+
Usually less well. Scar tissue has a weaker blood supply, so survival may be lower and growth less dense. For this reason grafts are spaced more widely and expectations for the result are kept moderate. A survival rate cannot be guaranteed.
What should I do if I already have a bald patch but no diagnosis?+
Avoid self-medicating and book a trichologist consultation. The doctor will perform trichoscopy, order a biopsy and tests if needed, and determine whether it is a cicatricial form. The sooner this is clarified, the more follicles can be preserved.