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Living with Pseudopelade of Brocq

A slowly progressing condition that causes patches of scarring hair loss on the scalp.

Understanding Pseudopelade of Brocq

Pseudopelade of Brocq (PBB) is a slowly progressing, long-term condition that causes scarring hair loss (cicatricial alopecia).

Patches of hair loss may be single or multiple. They are usually small, round or oval, and uneven in shape. The skin underneath is smooth, soft, and flesh-colored or white, with little or no inflammation. It usually starts in adulthood.

Signs & symptoms

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

  • Patches of hair loss
  • Thin hair on the scalp
  • Smooth, soft, skin-colored or white skin in the patches
  • Small bumps (papules)
  • Skin infections that come back
  • Thickened skin (lichenification)

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
Is my hair loss pseudopelade of Brocq, and how is it confirmed?
What can be done to slow the patches?
Should I see a skin doctor (dermatologist) who knows scarring hair loss?

Quick facts

Symptoms usually startAdult

GARD says the exact cause isn't known, but it is believed to be an autoimmune disease. Infection with Borrelia burgdorferi (the Lyme disease bacterium) and failure of hair-growth stem cells may also play a role.

Skin

Also known as: brocq pseudopelade; pseudo-pelade of brocq; pseudopelade

Patient organizations

Source: NIH GARD · Pseudopelade of BrocqGARD ID 4536 · 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 Pseudopelade of Brocq.

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Explore actively recruiting Pseudopelade of Brocq studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Pseudopelade of Brocq 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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