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Living with Pili bifurcati

An uncommon hair shaft condition in which a single hair splits into two parallel branches and then joins again.

Understanding Pili bifurcati

Pili bifurcati is an uncommon, temporary hair shaft condition in which part of a hair splits into two branches.

In affected hairs, the shaft divides into two parallel branches that then join into a single shaft again. Each branch has its own outer covering (cuticle). GARD lists childhood as a typical time for it to be noticed.

Signs & symptoms

GARD lists these among the most common signs:

  • Hair that splits into two branches along the shaft
  • Changes in hair texture
  • Changes in how the hair looks

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 genetic specialists and 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
Genetic specialists (geneticists); 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 Children's Skin Disease Foundation
  • 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
How is pili bifurcati diagnosed?
Is it likely to go away on its own, as the word transitory suggests?
Are other hair or skin conditions possible?

Quick facts

Symptoms usually startChild

GARD says changes in genes cause this condition but doesn't name a gene or describe an inheritance pattern.

GeneticSkin

Also known as: compound hairs; pili multigemini

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Pili bifurcatiGARD ID 18703 · 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 Pili bifurcati.

Explore the Pili bifurcati blog

Explore research for Pili bifurcati

Explore actively recruiting Pili bifurcati studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Pili bifurcati 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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