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PubMed This is a summary of 63 peer-reviewed journal articles Updated
Dermatology · Folliculitis Decalvans

Quinquaud Folliculitis Decalvans: A Patient Guide

At a Glance

Quinquaud folliculitis decalvans is a chronic inflammatory scalp condition that can permanently destroy hair follicles and cause scarring hair loss. Doctors confirm it with a scalp examination, bacterial cultures, and a biopsy, then use treatment to control inflammation and protect remaining hair.

Quinquaud folliculitis decalvans (FD) is a rare and persistent inflammatory condition of the scalp that belongs to a group of disorders known as primary cicatricial alopecias, or scarring hair loss [1][2]. It is characterized by the appearance of painful pustules, crusting, and redness around the hair follicles, which can eventually lead to the destruction of the follicle and its replacement with permanent scar tissue [3][4]. Because the loss of hair in these scarred areas is irreversible, prompt diagnosis and management are vital to help protect the hair you still have [2][5].

What You Need to Know Today:

  • FD causes permanent hair loss only in areas where follicles are already scarred; treatment aims to save remaining hair.
  • Active disease can often be stabilized, though the condition is chronic and relapsing.
  • Hair regrowth is not the immediate measure of success—stopping progression is.
  • This guide provides information based on medical literature, but it does not replace individualized dermatologic care.

The underlying cause of FD is not a simple infection, but rather a complex “mismatch” between your immune system and the environment of your scalp [6][7]. While a common bacterium called Staphylococcus aureus is often present, the disease is thought to be driven by a dysregulated immune response that overreacts to these bacteria, possibly fueled by a protective bacterial biofilm that shields the microbes from standard treatments [8][9]. Understanding that this is a biological immune disorder—not a sign of poor hygiene—is essential for both medical management and emotional well-being [7].

Because FD can closely resemble other types of scarring hair loss, such as Lichen planopilaris, specialists use a combination of tools to help confirm the diagnosis [10][11]. A thorough evaluation typically includes trichoscopy (magnified scalp examination), bacterial cultures to guide antibiotic selection if needed, and a scalp biopsy to observe the specific inflammatory patterns beneath the skin [12][13][14]. This rigorous process helps ensure that your care team is treating the correct condition with the most effective tools available [10].

The philosophy of treatment in FD is often described as “putting out the fire” to prevent further damage [2]. Doctors often use a stepped approach, starting with targeted oral antibiotics or oral isotretinoin to achieve remission, and moving to advanced, often off-label therapies like biologics or JAK inhibitors if the condition remains stubborn [15][16]. While medical care focuses on stabilization, the significant emotional burden of living with a visible, chronic condition—including common experiences of anxiety and depression—means that psychological support and practical camouflage options are equally vital components of a comprehensive care plan [17][18]. With specialized, long-term monitoring, it is possible to halt the progression of the disease and maintain a high quality of life [5][15].

In this guide

6 chapters

01

Understanding Folliculitis Decalvans: What to Expect

Learn what to expect with folliculitis decalvans, including symptoms, permanent scarring, treatment goals, biopsy questions, red flags, and emergency signs.

02

What’s Happening in the Scalp: Symptoms and Biology

Learn how folliculitis decalvans causes scalp pustules, tufted hairs, pain, and scarring, and how bacteria and immune responses may drive disease in the scalp.

03

The Path to Diagnosis: Tests and Comparisons

Learn how folliculitis decalvans is diagnosed using scalp exams, trichoscopy, cultures, and biopsy, and how doctors assess lichen planopilaris overlap.

04

Treatment Options: From First-Line to Advanced Care

Learn about folliculitis decalvans treatment, including antibiotics, isotretinoin, advanced therapies, safety monitoring, relapse, and hair transplant timing.

05

Building Your Care Team: Preparing for Your First Specialist Visit

Learn how to prepare for a folliculitis decalvans specialist visit, including biopsy records, cultures, treatment history, symptom tracking, and photos.

06

Day-to-Day Management and Living with FD

Learn how to live with folliculitis decalvans, including scalp care, flare warning signs, emotional support, camouflage, and safe hair restoration options.

Common questions in this guide

What is Quinquaud folliculitis decalvans?
Quinquaud folliculitis decalvans, often called FD, is a rare, chronic inflammatory condition of the scalp. It causes pustules, crusting, and redness around hair follicles and can lead to permanent scarring hair loss.
Can hair lost from folliculitis decalvans grow back?
Hair cannot regrow from areas where inflammation has destroyed the follicles and replaced them with scar tissue. Treatment focuses on stopping active disease and protecting follicles that have not yet been scarred.
How is folliculitis decalvans diagnosed?
Diagnosis may include a scalp examination, trichoscopy or magnified scalp viewing, bacterial cultures, and a scalp biopsy. These assessments help distinguish folliculitis decalvans from other scarring hair-loss conditions, including lichen planopilaris.
Is folliculitis decalvans caused by an infection or poor hygiene?
No. Folliculitis decalvans is not simply an infection or a result of poor hygiene; it is thought to involve an abnormal immune response to the scalp environment. Staphylococcus aureus and bacterial biofilms may be present, but bacteria alone do not explain the condition.
What treatments are used for folliculitis decalvans?
Treatment aims to calm active inflammation, prevent additional scarring, and protect remaining hair rather than produce immediate regrowth. Doctors may use targeted oral antibiotics or oral isotretinoin first, while biologic medicines or JAK inhibitors may be considered, often off-label, when disease remains difficult to control.
How can I tell if folliculitis decalvans is flaring?
New or worsening pustules, crusting, redness, pain, or itching can signal active scalp inflammation. Regular follow-up with a dermatologist can help track disease activity and adjust treatment before more follicles are damaged.
Can folliculitis decalvans affect emotional well-being?
Living with chronic, visible scarring hair loss can contribute to anxiety, depression, and reduced quality of life. Psychological support, a personal support system, and practical camouflage options can be part of comprehensive care.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Are you experienced in treating primary cicatricial alopecias, and do you collaborate with a dermatopathologist for biopsy reviews?
  2. 2.What is our primary goal for my treatment right now—stopping active pustules or maintaining long-term stability?
  3. 3.How will we monitor my scalp for signs of activity, and what should I look for during a flare-up?
  4. 4.What is your approach to managing the psychological and quality-of-life impacts of this condition?
  5. 5.If my current treatment does not stabilize the inflammation, what are our next-step options for more advanced therapy?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (18)
  1. 1

    Primary cicatricial alopecia in a single-race Asian population: A 10-year nationwide population-based study in South Korea.

    Yoon J, Choi JW

    The Journal of dermatology 2018; (45(11)):1306-1311 doi:10.1111/1346-8138.14625.

    PMID: 30188582
  2. 2

    Cicatricial alopecia.

    Kanti V, Röwert-Huber J, Vogt A, Blume-Peytavi U

    Journal der Deutschen Dermatologischen Gesellschaft = Journal of the German Society of Dermatology : JDDG 2018; (16(4)):435-461 doi:10.1111/ddg.13498.

    PMID: 29645394
  3. 3

    Successful Treatment with Fusidic Acid in a Patient with Folliculitis Decalvans.

    Pimenta R, Borges-Costa J

    Acta dermatovenerologica Croatica : ADC 2019; (27(1)):49-50.

    PMID: 31032795
  4. 4

    Histopathologic and dermoscopic features of 42 cases of folliculitis decalvans: A case series.

    Uchiyama M, Harada K, Tobita R, et al.

    Journal of the American Academy of Dermatology 2021; (85(5)):1185-1193 doi:10.1016/j.jaad.2020.03.092.

    PMID: 32272176
  5. 5

    A Practical Approach to the Diagnosis and Management of Classic Lichen Planopilaris.

    Svigos K, Yin L, Fried L, et al.

    American journal of clinical dermatology 2021; (22(5)):681-692 doi:10.1007/s40257-021-00630-7.

    PMID: 34347282
  6. 6

    Inflammasome Activation Characterizes Lesional Skin of Folliculitis Decalvans.

    Eyraud A, Milpied B, Thiolat D, et al.

    Acta dermato-venereologica 2018; (98(6)):570-575 doi:10.2340/00015555-2924.

    PMID: 29542810
  7. 7

    Epidemiological and Clinical Evidence for the Role of Toxins in S. aureus Human Disease.

    Bennett MR, Thomsen IP

    Toxins 2020; (12(6)) doi:10.3390/toxins12060408.

    PMID: 32575633
  8. 8

    Comment on Topical Dapsone for Folliculitis Decalvans.

    Trüeb RM, Luu NC, Rezende HD

    International journal of trichology 2023; (15(3)):88-90 doi:10.4103/ijt.ijt_39_22.

    PMID: 38179006
  9. 9

    Folliculitis Decalvans Has a Heterogeneous Microbiological Signature and Impaired Immunological Response.

    Moreno-Arrones OM, Garcia-Hoz C, Del Campo R, et al.

    Dermatology (Basel, Switzerland) 2023; (239(3)):454-461 doi:10.1159/000529301.

    PMID: 36716709
  10. 10

    Linear Circumscribed Scleroderma-Like Folliculitis Decalvans: Yet Another Face of a Protean Condition.

    Rezende HD, Dias MFRG, Kempf W, Treüb RM

    International journal of trichology 2018; (10(4)):175-179 doi:10.4103/ijt.ijt_9_18.

    PMID: 30386078
  11. 11

    Clinical, Trichoscopic, and Histopathological Features of Primary Cicatricial Alopecias: A Retrospective Observational Study at a Tertiary Care Centre of North East India.

    Thakur BK, Verma S, Raphael V

    International journal of trichology 2015; (7(3)):107-12 doi:10.4103/0974-7753.167459.

    PMID: 26622153
  12. 12

    Tufted hairs: A bouquet of flowers in different hair diseases.

    Starace M, Vezzoni R, Alessandrini A, et al.

    Journal of cosmetic dermatology 2022; (21(9)):3741-3746 doi:10.1111/jocd.14712.

    PMID: 35001495
  13. 13

    Gram-negative infections in patients with folliculitis decalvans: a subset of patients requiring alternative treatment.

    Samrao A, Mirmirani P

    Dermatology online journal 2020; (26(2)).

    PMID: 32239885
  14. 14

    Cross-sectional study to evaluate the utility of elastic tissue staining in primary cicatricial alopecia.

    Vishwanath T, Dhurat R

    Journal of clinical pathology 2024; (77(11)):737-742 doi:10.1136/jcp-2022-208745.

    PMID: 37553248
  15. 15

    Management of folliculitis decalvans: The EADV task force on hair diseases position statement.

    Waśkiel-Burnat A, Starace M, Iorizzo M, et al.

    Journal of the European Academy of Dermatology and Venereology : JEADV 2025; (39(8)):1385-1394 doi:10.1111/jdv.20687.

    PMID: 40230058
  16. 16

    Isotretinoin treatment for folliculitis decalvans: a retrospective case-series study.

    Aksoy B, Hapa A, Mutlu E

    International journal of dermatology 2018; (57(2)):250-253 doi:10.1111/ijd.13874.

    PMID: 29313960
  17. 17

    Health-related quality of life (hrQoL) among patients with primary cicatricial alopecia (PCA): A systematic review.

    Singh R, Wilborn D, Lintzeri DA, Blume-Peytavi U

    Journal of the European Academy of Dermatology and Venereology : JEADV 2023; (37(12)):2462-2473 doi:10.1111/jdv.19381.

    PMID: 37478298
  18. 18

    The spectrum of pediatric scarring alopecia: A retrospective review of 27 patients seen at Mayo Clinic.

    Imhof RL, Cantwell HM, Proffer SL, et al.

    Pediatric dermatology 2021; (38(3)):580-584 doi:10.1111/pde.14543.

    PMID: 33644931

This page about Quinquaud folliculitis decalvans is for informational purposes only and does not constitute medical advice. A dermatologist should interpret your symptoms and biopsy results and recommend treatment for your situation.

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