DefinitionPolymyositis is a rare disease of the muscles. It usually affects the muscles closest to the trunk of the body. However, it may affect muscles anywhere in the body.
|Front Muscles of Trunk|
|Copyright © Nucleus Medical Media, Inc.|
CausesPolymyositis may be caused by a combination of genetic and environmental factors that trigger an abnormal immune response.
Risk FactorsPolymyositis is more common in women and in people aged 31-60 years old.
SymptomsPolymyositis causes muscles become inflamed or swollen. Symptoms may include:
- Muscle weakness
- Muscle pain that increases over time
- Great effort needed to climb stairs
- Trouble rising from a chair
- Difficulty reaching overhead
- Chronic dry cough
DiagnosisYou will be asked about your symptoms and medical history. A physical exam will be done.Your bodily fluids and tissues may be tested. This can be done with:
- Blood tests
- Muscle biopsy
TreatmentThe disease is progressive and starts slowly. If untreated, the muscles gradually become weaker. The pain in the muscles also increases. While there is no cure, treatment can improve your muscle strength and function. Talk with your doctor about the best plan for you. Options include:
MedicationMedications to treat polymyositis may include:
- Corticosteroids to reduce inflammation
- Topical steroids to treat skin rash
Physical TherapyYour doctor may recommend that you work with a physical therapist to prevent permanent muscle damage. Exercise may include:
- A regular stretching routine for weakened arms and legs
- Light strengthening as the pain lessens and function returns
Dietary ChangesPolymyositis can lead to problems with chewing and swallowing. By working with a registered dietitian, you can learn ways to adjust to these changes and get the nutrition that you need.
Speech TherapyPolymyositis may also cause speech problems. A speech therapist can assess your condition and create a program for you.
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