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Living with Myocarditis

Inflammation of the heart muscle, which can cause chest pain, an abnormal heartbeat, and shortness of breath.

Understanding Myocarditis

Myocarditis is a condition in which the heart muscle (myocardium) becomes inflamed.

Some people have no noticeable symptoms. It can be caused by infections, allergic reactions to certain medicines, and exposure to certain chemicals. It can also be linked to other inflammatory conditions, such as lupus. Most cases occur in people with no family history of it.

Signs & symptoms

Symptoms vary from person to person. When symptoms are present, GARD lists these:

  • Chest pain
  • Abnormal heartbeat
  • Shortness of breath
  • Tiredness (fatigue)
  • Fever, headache, sore throat, or diarrhea
  • Leg swelling

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.

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
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 Myocarditis 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
What caused my myocarditis?
Which tests will show how my heart is working?
Which symptoms should lead me to seek care right away?

Quick facts

Myocarditis can be caused by infections (viral, bacterial, parasitic, and fungal), allergic reactions to certain medicines, and exposure to certain chemicals. It can also be linked to inflammatory conditions such as lupus.

Also known as: inflammation of heart muscle; inflammation of myocardium; myocardial inflammation; myocardial inflammation (finding); myocardium inflammation

Patient organizations

Source: NIH GARD · MyocarditisGARD ID 7137 · 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 Myocarditis.

Explore the Myocarditis blog

Explore research for Myocarditis

Explore actively recruiting Myocarditis studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Myocarditis 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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I can help you find recruiting Myocarditis 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.

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

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