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Polymyositis is a rare autoimmune disorder that causes muscle inflammation and weakness. The exact cause of polymyositis is unknown, but it is believed to be triggered by an abnormal immune response that attacks the muscles.
Symptoms of polymyositis usually develop gradually over weeks or months and can include:
Diagnosis of polymyositis typically involves a combination of blood tests, imaging studies such as MRI or CT scans, and a muscle biopsy to examine a sample of muscle tissue.
Treatment for polymyositis typically involves medications that suppress the immune system, such as corticosteroids or immunosuppressive drugs. Physical therapy and rehabilitation can also help improve muscle strength and function. In some cases, intravenous immunoglobulin therapy (IVIG) or plasma exchange may also be used to suppress the immune system.
Prognosis for polymyositis can vary depending on the severity and progression of the disease, but early diagnosis and treatment can improve outcomes. It is important to seek medical attention if symptoms of polymyositis develop, as early diagnosis and treatment can prevent complications and improve outcomes.