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Living with Acromelanosis

A rare skin condition in which darker skin appears on the fingers and toes and may spread, mostly in newborns.

Understanding Acromelanosis

Acromelanosis is a rare skin pigment condition with darker skin on the backs of the fingers and toes.

The darker patches usually cause no symptoms. They may spread quickly toward the center of the body, such as the genitals, belly, and thighs. It is mostly seen in newborns or during the first years of life. GARD lists onset as the newborn and infant period.

Signs & symptoms

GARD describes the darker skin as usually asymptomatic, meaning it causes no symptoms.

  • Darker skin on the backs of the fingers and toes
  • Dark patches that spread toward the thighs and belly

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 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
Is this pigment change harmless?
Should my child be checked for other skin conditions?
Do these patches need follow-up over time?

Quick facts

Symptoms usually startNewborn and as an Infant

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

Skin

Also known as: progressive acromelanosis

Patient organizations

Broader rare-disease groups

Source: NIH GARD · AcromelanosisGARD ID 4500 · 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 Acromelanosis.

Explore the Acromelanosis blog

Explore research for Acromelanosis

Explore actively recruiting Acromelanosis studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Acromelanosis 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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