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Living with Folliculitis decalvans

A rare long-lasting scalp condition that causes patches of scarring hair loss with pimples and crusts, mostly in middle-aged adults.

Understanding Folliculitis decalvans

Folliculitis decalvans is a rare, long-lasting inflammatory scalp condition that causes scarring hair loss.

It usually affects middle-aged adults. Patches of hair loss slowly spread, mostly at the top and back of the scalp, along with red skin around hair follicles, pimples, and bloody crusts.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Patchy hair loss with scarring
  • Pimples (pustules) on the scalp
  • Redness of the skin
  • Bloody crusts
  • Repeated skin infections
  • Scarring

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include skin, hair, and nail specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Skin, hair, and nail specialists (dermatologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Scarring Alopecia Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Which treatments can slow the scarring hair loss?
Do I need a scalp biopsy or a swab for infection?
Will hair loss areas regrow?

Quick facts

Symptoms usually startAdult

GARD doesn't describe a cause for this condition yet.

Skin

Also known as: folliculitis depilans; quinquaud folliculitis decalvans; quinquaud's disease; quinquaud's folliculitis decalvans

Patient organizations

Source: NIH GARD · Folliculitis decalvansGARD ID 373 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Folliculitis decalvans.

Explore the Folliculitis decalvans blog

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Explore actively recruiting Folliculitis decalvans studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Folliculitis decalvans with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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