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Living with Chronic multifocal osteomyelitis

A condition, also called CRMO, that causes repeated inflammation in and around bones, with pain and swelling.

Understanding Chronic multifocal osteomyelitis

Chronic multifocal osteomyelitis, or chronic recurrent multifocal osteomyelitis (CRMO), causes abnormal inflammation in and around the bones.

Symptoms usually begin in childhood but can occur at any age. In some cases, it leads to abnormal bone growth, bone deformity, and fractures. It may occur alone or along with skin or bowel inflammation conditions. In rare cases it is part of Majeed syndrome, DIRA, or PAPA syndrome. Diagnosis is based on symptoms, an exam, and imaging.

Signs & symptoms

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

  • Bone pain
  • Joint swelling and arthritis
  • Skin redness
  • Fever, sometimes
  • Bone overgrowth
  • Bone deformity and fractures, in some

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 skin, hair, and nail 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 may keep lists of experts for this condition.

Care & treatment

Care team
autoimmune and inflammatory disease specialists (rheumatologists); Skin, hair, and nail specialists (dermatologists)
Expert care
Expert lists: Autoimmune 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 imaging confirmed the diagnosis?
Could this be part of a syndrome like Majeed, DIRA, or PAPA?
How can we track bone changes and protect the skeleton?

Quick facts

Symptoms usually startChild and as a Teenager

GARD says the cause is unknown, but a genetic influence is thought to be involved.

Skin

Also known as: chronic nonbacterial osteomyelitis/chronic recurrent multifocal osteomyelitis; chronic recurrent multifocal osteomyelitis; chronic recurrent multifocal osteomyelitis (disease); cno/crmo; crmo; nbo

Patient organizations

Source: NIH GARD · Chronic multifocal osteomyelitisGARD ID 6108 · 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 Chronic multifocal osteomyelitis.

Explore the Chronic multifocal osteomyelitis blog

Explore research for Chronic multifocal osteomyelitis

Explore actively recruiting Chronic multifocal osteomyelitis studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Chronic multifocal osteomyelitis 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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