Skip to content
knowrare
HealthSignal
Your condition community

Living with Autosomal erythropoietic protoporphyria

An inherited condition that makes skin extremely sensitive to sunlight and can affect the liver.

Understanding Autosomal erythropoietic protoporphyria

Autosomal erythropoietic protoporphyria (EPP) is a type of porphyria in which a substance called protoporphyrin builds up and makes skin very sensitive to sunlight.

Porphyrias are caused by a problem in making heme, which helps blood cells carry oxygen. In EPP, protoporphyrin builds up in the blood, skin, and eventually the liver. This can cause extreme sun sensitivity, liver damage, belly pain, gallstones, and an enlarged spleen. Signs usually begin in the newborn period or infancy.

Signs & symptoms

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

  • Skin that is very sensitive to sunlight
  • Itching
  • Redness of the skin
  • Belly pain
  • Gallstones
  • Liver damage

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 blood and bone marrow specialists, genetic specialists, kidney specialists and skin, hair, and nail specialists.

  3. Consider genetic testing

    Changes in FECH are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    American Porphyria Foundation and United Porphyrias Association may keep lists of experts for this condition.

Care & treatment

Care team
Blood and bone marrow specialists (hematologists); Genetic specialists (geneticists); Kidney specialists (nephrologists); Skin, hair, and nail specialists (dermatologists)
Expert care
Expert lists: American Porphyria Foundation, United Porphyrias Association
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 American Porphyria 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
Can genetic testing for the FECH gene confirm my diagnosis?
How often should my liver be checked?
What can I do to protect my skin from sunlight?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Dominant, Autosomal Recessive
GenesFECH

EPP is caused by changes in the FECH gene, which lower the activity of an enzyme needed to make heme. GARD's summary says inheritance is autosomal recessive, though GARD lists dominant as well.

GeneticKidneySkinBloodInherited Metabolic

Also known as: epp

Patient organizations

Source: NIH GARD · Autosomal erythropoietic protoporphyriaGARD ID 4527 · 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 Autosomal erythropoietic protoporphyria.

Explore the Autosomal erythropoietic protoporphyria blog

Explore research for Autosomal erythropoietic protoporphyria

Explore actively recruiting Autosomal erythropoietic protoporphyria studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Autosomal erythropoietic protoporphyria 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

Powered by HealthSpark, our AI chat helper

I can help you find recruiting Autosomal erythropoietic protoporphyria studies. Enter a ZIP code, address or city below and I'll look within 50 miles.

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

Get Signals for Autosomal erythropoietic protoporphyria

Stay in the loop with community stories and updates from medical researchers.

HealthStoryfor Autosomal erythropoietic protoporphyria

Create a living journal that talks back

HealthStory evolves private journaling with a living AI journal that talks back and asks thoughtful questions, helping you capture your Autosomal erythropoietic protoporphyria experiences more deeply and prepare for better conversations with your doctors and care team.

Start your journal

Your journal is private. Sharing your story publicly is a separate choice, made with Share your story above.