Fast Facts

  • Polymyositis and dermatomyositis occur in about one person per 100,000.
  • All ages can get these diseases.
  • Weakness in the large muscles around the neck, shoulders and hips.
  • Myopathy almost always causes loss of muscle strength.
  • Some patients also have rashes or breathing problems, or both.
  • Treatment is most often effective. Following your doctor’s treatment plan is key to having a good outcome.

The two inflammatory myopathies include polymyositis and dermatomyositis. Muscle inflammation and weakness occur in both conditions while patients with dermatomyositis also have a rash. Proper diagnosis and treatment raise the chance of living life fully despite this illness.

For more information: