Inclusion Body Myositis: Causes, Symptoms, and Treatment

Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 23, 2026.

What kind of doctor treats Inclusion Body Myositis?

A neurologist, a doctor who treats diseases of the nerves and muscles, usually leads care for inclusion body myositis. A rehabilitation team, which helps with movement and daily tasks, is often needed too. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.

What is inclusion body myositis?

Inclusion body myositis, or IBM, is a muscle disease that gets worse over time. It belongs to a group of muscle diseases called inflammatory myopathies. These diseases are marked by long-lasting muscle inflammation (swelling) and weakness. IBM tends to hit the muscles that bend the fingers and the muscles at the front of the thigh. Doctors still debate how IBM develops and how best to treat it.

Symptoms

The weakness usually builds slowly, over months or years.

  • Falling and tripping are usually the first signs people notice.
  • Weak wrists and fingers can make pinching, buttoning, and gripping objects hard.
  • Stairs and getting up from a low seat can become hard.
  • The forearm muscles and thigh muscles can get thinner.
  • Trouble swallowing happens in about half of people with IBM.

Weakness may affect only one side of the body. A smaller group of people first have unusual signs, such as trouble swallowing, foot drop (a foot that is hard to lift), or a head that is hard to hold up.

Causes and who gets it

Symptoms usually begin after age 50, although IBM can start earlier. IBM happens more often in men than in women.

How doctors diagnose it

IBM can be mistaken for other muscle diseases, such as polymyositis, especially early on. A muscle biopsy, which means testing a small piece of muscle, remains the best test to confirm IBM. Nerve tests and electromyography, or EMG, help show whether the problem starts in the muscles or in the nerves. A blood level called creatine kinase is raised in many people with IBM. Weakness that gets worse very fast should make doctors doubt the diagnosis of IBM.

Treatment

There is no cure for IBM. The disease is generally unresponsive to corticosteroids and immunosuppressive drugs, which are medicines that calm the immune system. Intravenous immunoglobulin, a medicine given through a vein, may help a little for a short time in a small number of people. Current treatments do not seem to change how fast IBM gets worse. Other care treats symptoms and gives support.

  • Physical therapy may help keep you moving.
  • Exercise, especially resistance training, may help keep or improve muscle strength.
  • Walkers, braces, and other devices can help with hand use and getting around.
  • A doctor may refer you to a speech pathologist for a formal swallowing evaluation.

Swallowing problems are often missed, yet aspiration pneumonia, a lung infection, is the most common cause of death in IBM. Doctors may also order tests such as an overnight oxygen check or a sleep study to look at breathing.

When to see a doctor

Frequent falls or tripping are worth a visit, since they are usually the first signs of IBM. Weak wrists or fingers that make buttoning or gripping hard should be checked too. Trouble swallowing also needs a check, because a doctor may refer you to a speech pathologist for a formal swallowing evaluation. Weakness that gets worse very fast needs a doctor's review, because IBM is a slowly progressive disease. Call 911 or go to the emergency room if you choke, have trouble breathing, faint, or lose consciousness.

How a direct primary care or concierge doctor fits in

A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Such a doctor can track changes over time and help set up visits with a rehabilitation team and a speech pathologist.

Common questions

Is there a cure for inclusion body myositis?

No, there is no cure for IBM. Care focuses on keeping you moving and treating symptoms, and physical therapy may help.

What are the first signs of IBM?

Falling and tripping are usually the first signs people notice. For some people, the first sign is weakness in the wrists and fingers.

Does IBM affect swallowing?

Yes, trouble swallowing happens in about half of people with IBM. A doctor may refer you to a speech pathologist for a formal swallowing evaluation.

Can exercise help with IBM?

Exercise may help, especially resistance training. A rehabilitation team is often needed, and part of its care is an exercise program.

Who usually gets inclusion body myositis?

IBM usually starts after age 50 and is more common in men than in women. It can start earlier in some people.

Sources

  1. National Institute of Neurological Disorders and Stroke - Inclusion Body Myositis
  2. National Library of Medicine (PubMed Central) - Inclusion body myositis: Update on the diagnostic and therapeutic landscape

Medical Disclaimer

This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.