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Living with Eosinophilia myalgia syndrome

A complex condition with high eosinophil counts and severe muscle pain that can affect many organs.

Understanding Eosinophilia myalgia syndrome

Eosinophilia myalgia syndrome is a complex condition that causes inflammation in the skin, muscles, nerves, blood vessels, lungs, and heart.

Key features are a high count of white blood cells called eosinophils and muscle pain severe enough to limit daily activities. Doctors also check that infection or other conditions do not explain the high eosinophils. Tissue samples show widespread inflammation in connective tissue.

Signs & symptoms

GARD describes these features in its summary:

  • High eosinophil count in the blood
  • Muscle pain (myalgia) severe enough to limit activities
  • Inflammation of the skin, muscle, and nerves

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

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

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

  4. Connect with expert centers

    American Partnership For Eosinophilic Disorders may keep lists of experts for this condition.

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
Expert care
Expert lists: American Partnership For Eosinophilic Disorders
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 Partnership For Eosinophilic Disorders 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
Which tests confirm this diagnosis and rule out other causes?
Which organs should be monitored?
Which specialists should be on my care team?

Quick facts

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

Also known as: ems; ems - eosinophilia myalgia syndrome; eosinophilia-myalgia syndrome

Patient organizations

Source: NIH GARD · Eosinophilia myalgia syndromeGARD ID 6345 · 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 Eosinophilia myalgia syndrome.

Explore the Eosinophilia myalgia syndrome blog

Explore research for Eosinophilia myalgia syndrome

Explore actively recruiting Eosinophilia myalgia syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Eosinophilia myalgia 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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