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Living with Reye syndrome

A sudden metabolic condition, mainly in children, that causes brain swelling, a fatty liver, and low blood sugar.

Understanding Reye syndrome

Reye syndrome is a sudden metabolic condition that causes swelling in the brain, fat in the liver, and low blood sugar.

It occurs mainly in children. It has been linked to the use of aspirin to treat viral infections, but it can also happen without aspirin. GARD lists the onset as a variety of ages.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. Its summary describes these:

  • Swelling in the brain (cerebral edema)
  • Fatty liver
  • Low blood sugar (hypoglycemia)

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 autoimmune and inflammatory disease specialists.

  3. Ask which tests can help

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

Care & treatment

Care team
autoimmune and inflammatory disease specialists (rheumatologists)
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 rare disease patient organizations for support
  • 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 medicines should we avoid when a child has a virus?
What warning signs mean we need urgent care?
Which specialists should be involved in follow-up care?

Quick facts

Symptoms usually starta variety of ages

GARD says it has been linked to aspirin use during viral infections, but it can also occur without aspirin. It does not list a gene.

Also known as: fatty liver with encephalopathy; reye's encephalopathy; reye's syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Reye syndromeGARD ID 7570 · 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 Reye syndrome.

Explore the Reye syndrome blog

Explore research for Reye syndrome

Explore actively recruiting Reye syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Reye syndrome 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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