Central centrifugal cicatricial alopecia (CCCA): symptoms, causes and treatment

Central centrifugal cicatricial alopecia, or CCCA, typically presents as progressive thinning from the central scalp, gradually expanding outward as the condition advances.  In the early stages it presents as an itchy scalp and dry, brittle hair.  In more advanced stages there is a persistent itch and thinning or breakage in the centre of the scalp.  In advanced stages there is scarring, painful bumps, crawling sensations and flares that have been described as feeling like one hundred hot pins stuck on your scalp for weeks at a time.  

CCCA was first described as “hot comb alopecia” in 1968 after assessment of 51 African American women who developed a bald patch after the use of hot combs and petrolatum.  This belief was widely held until further studies showed the same pattern of hair loss in women that had never used a hot comb.  Further studies highlighted an association with relaxers and tight hair styling.  

Progression of the condition is often insidious, generally occurring in the absence of any other clinical signs of overt inflammation.  The absence of early stage clinical signs gives the impression that end stage fibrosis appears at a rate that seems disproportionate to inflammation, a finding common to fibroproliferative disorders (FPDs).

The Research 

The 1968 study that determined CCCA was caused by the use of hot combs and petrolatum was revisited by Sperling and Sau in 1992.  They retrospectively studied the hair care habits and scalp biopsy specimens of 10 African American women.  They found no relationship between hot comb use and the onset and progression of the condition, though it remained unclear whether the use of hair products contributed to follicle inflammation and degeneration that could act as a trigger.  They believed external injury to the scalp due to chemical application of perms or relaxers likely contributed to ongoing follicle degeneration.  This belief was corroborated by a 1993 study of 8 women of Afro Caribbean descent.  In 2001, the condition was renamed from hot comb alopecia to CCCA by the North American Hair Research Society.  It reflects a collective name for a group of disorders characterised by a common feature of inflammation and fibrosis.

A review article by Herskovitz and Miteva in 2016, found that traction alopecia was often linked with the condition, though this was challenged by Khumalo in 2007.  A 2012 study by Callendar, investigated whether hair breakage could be an early presentation of CCCA by performing scalp biopsies on the scalps of eight Black women with brittle hair. Five biopsies out of eight showed levels of fibrosis consistent with CCCA.  Out of those five, one sample showed advanced, end-stage changes, where entire follicle units had been completely replaced by scar tissue, and seven out of eight specimens showed early shedding of the follicle’s inner lining, a finding often associated with early CCCA. Only one biopsy was normal. All participants reported itchy sensitive scalp and prior chemical relaxer use.  

The CCCA pathological pathway

The biological pathways that repair the inflammation that is present in the early stages of CCCA, ultimately become the driver of the condition: irritation triggers inflammation, inflammation triggers repair, and the repair signals  feed back into inflammatory load, keeping the cycle active.  Collagen accumulates, the tissue stiffens, and the end-stage picture is scarring, with follicles replaced by scar tissue. 

1. Scalp barrier disruption creates a pro- inflammatory environment

Hard water mineral build-up, harsh shampoos, product residue, chemical exposure, heat and scratching can disrupt the scalp barrier at the level of the upper follicle.  As a result, scalp permeability increases, sebum and surface lipids become altered, and the scalp becomes less acidic and more alkaline. These changes make the scalp more reactive and create conditions that favour microbial imbalance and biofilm persistence around the follicular opening.

2. pH drift shifts the microbiome and increases enzymatic irritation

The scalp surface normally sits in a mildly acidic range, which supports barrier function and keeps microbial behaviour more stable. When pH drifts upward, becoming more alkaline, commensal balance can shift and organisms that tolerate higher pH are more likely to overgrow. At the same time, key barrier enzymes and lipid-processing pathways function less efficiently, so the scalp is slower to rebuild a resilient surface. Higher pH also favours increased protease activity at the scalp surface, which irritates the follicular opening and intensifies inflammation and shedding.  Over time, some bacteria and fungus can attach to the follicular canal and form organised communities embedded in a protective biofilm. This biofilm state increases persistence and makes microbial activity harder to fully clear with routine cleansing, allowing low-grade irritation and immune signalling to continue and feed into downstream repair pathways. This creates a self-reinforcing cycle, because pH drift weakens barrier recovery, and a weakened barrier makes pH regulation more difficult.

3. Fungal overgrowth amplifies itch, barrier stress, and follicular irritation

Increased fungal activity drives nerve-linked inflammation, producing redness, sensitivity, burning, and persistent itchiness. Biofilm extends from the upper scalp onto the lower regions of the hair follicle contributing to premature shedding of the follicle’s inner lining, by sustaining a more enzyme-active, irritation-prone microenvironment that breaks down the adhesive properties of follicle lining. When the inner root sheath sheds prematurely, internal support for the growing hair fibre becomes significantly reduced.  The growing hair is starved of oxygen and nutrition and is exposed to high levels of enzymes, leading to brittle hair formation and breakage as the hair emerges. 

4. Fibroblast activation locks in fibrosis

Fibroblasts, responsible for maintaining the scalp’s structural framework, start to switch into repair mode in response to irritation and damage caused by the biofilm.  When triggered, fibroblasts convert into myofibroblasts, a contractile scar-forming version of themselves. These myofibroblasts lay down more collagen and release inflammatory signals such as IL-6 and IL-8, which keeps the local tissue in a chronic repair state. Over time, collagen accumulates and the tissue around follicles becomes denser and stiffer (fibrosis), which disrupts the follicle environment further. In advanced CCCA, this culminates in follicles being replaced by scar tissue and loss of visible follicular openings, the end-stage scarring pattern.

Breaking the CCCA Cycle 

Breaking the CCCA cycle starts with targeting specific biological pathways, both local and systemic. Locally, the priority is to reduce ongoing irritation, stabilise the scalp barrier and pH, and reduce the microbial and enzymatic stress that cause the itching and scalp discomfort that are the early warning signals of the condition. The aim is stabilisation first, meaning fewer flares, less burning and tenderness, reduced progression of scarring features, and preservation of follicle structures that are still viable.  When the scalp environment normalises, fibroblast activity can stop locking into repair mode, and collagen deposition stops accumulating so rapidly.  At this point normal dermal modelling can facilitate the repair of partially affected hair follicles leading to the regrowth of hair in some areas. 

Systemically, supporting immune competence through nutrition and metabolic stability can strengthen that effort. Metabolic disturbance has been linked to CCCA, and biologically it fits: impaired glucose handling and chronic metabolic stress increase inflammatory tone, impair dermal function, and slow tissue repair after injury. Nutrition does not replace anti-inflammatory scalp management, but it can reduce the aggressive inflammatory response that results in the need for fibroblasts to engage in continual repair programmes. The practical targets are blood sugar stability, reduced oxidative stress, and micronutrient sufficiency for immune regulation and tissue maintenance. This includes adequate protein, iron sufficiency where appropriate, zinc and vitamin D sufficiency, omega-3 intake, and enough fibre and polyphenols to support gut-immune signalling. In combination, these measures reduce the drivers that keep the irritation–inflammation–repair loop running and improve the likelihood of long-term stability.

Conclusion 

CCCA research has moved way beyond the original “hot comb” theory into a multifactorial picture shaped by inflammation, immune activity, and a repair response that leads to the final stages of the condition. A well-rounded approach focuses on three priorities. First, suppress inflammatory activity.  Ongoing itch, burning, tenderness, and flare cycles are signals that the inflammatory loop is still running. Second, reduce the exposures that keep the scalp reactive, including mechanical stress, chemical and heat irritation, and scalp-surface disruption from deep-cleaning shampoos or heavy build-up from products or hard water. Improved barrier support and pH stability normalises microbial biofilm, immune activation and protease levels, which lowers the day-to-day “trigger load” around the follicle opening. Third, support long-term resilience by addressing systemic amplifiers, particularly metabolic strain and micronutrient insufficiency where present, because these can raise inflammatory tone, slow tissue recovery and make hair regrowth difficult.  Taken together, these measures aim to stabilise the condition and protect the follicle structures that are still viable.  Once inflammation is controlled and the scalp environment is stable, viable follicles can regain function and reenter normal hair growth cycle and sustain consistent growth over time.