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Living with Inclusion body myositis

A progressive muscle disease with inflammation and weakening of the legs, arms, fingers, and wrists, usually in older adults.

Understanding Inclusion body myositis

Inclusion body myositis (IBM) is a progressive muscle disorder with muscle inflammation, weakness, and wasting (atrophy).

It is a type of inflammatory myopathy that usually starts in adults and older adults. Some people also have weak facial muscles, especially those that close the eyes, or trouble swallowing (dysphagia). Muscle cramping and pain are uncommon.

Signs & symptoms

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

  • Growing weakness in the legs and arms
  • Weak fingers and wrists
  • Weak thigh (quadriceps) muscles
  • Wasting of muscle (atrophy)
  • Trouble swallowing
  • Weak facial muscles

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 and brain and nervous system specialists.

  3. Ask which tests can help

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

  4. Connect with expert centers

    Autoimmune Association, Global Autoimmune Institute and Muscular Dystrophy Association may keep lists of experts for this condition.

Care & treatment

Care team
autoimmune and inflammatory disease specialists (rheumatologists); Brain and nervous system specialists (neurologists)
Expert care
Expert lists: Autoimmune Association, Global Autoimmune Institute, Muscular Dystrophy 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 Autoimmune Association 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, such as muscle biopsy, confirm IBM?
What can help with swallowing problems?
How will we track my muscle strength over time?

Quick facts

Symptoms usually startAdult and as an Older Adult
InheritanceAutosomal Dominant

The cause is poorly understood and likely involves genes, the immune system, and the environment. Some people may have a genetic predisposition, but the condition itself typically is not inherited.

Neurological

Also known as: ibm; ibm - inclusion body myositis; sibm; sporadic inclusion body myositis

Patient organizations

Source: NIH GARD · Inclusion body myositisGARD ID 3896 · 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 Inclusion body myositis.

Explore the Inclusion body myositis blog

Explore research for Inclusion body myositis

Explore actively recruiting Inclusion body myositis studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Inclusion body myositis 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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