What Is Polymyositis?
Polymyositis is a rare inflammatory disease that causes muscles to become weak and irritated. The condition most often affects muscles near the center of the body, including the hips, shoulders, thighs, and upper arms.
The exact cause of polymyositis is not fully understood. Experts believe the condition may happen when the immune system mistakenly attacks healthy muscle tissue. Viral infections and environmental triggers may also play a role.
Over time, muscle weakness can make everyday activities more difficult. Tasks such as climbing stairs, getting out of a chair, or lifting objects may become challenging.
Symptoms
Symptoms of polymyositis usually develop gradually and may worsen over time if left untreated.
Common symptoms include:
- Muscle weakness on both sides of the body
- Muscle pain or tenderness
- Fatigue
- Joint discomfort
- Difficulty climbing stairs
- Trouble lifting the arms
- Difficulty swallowing
- Shortness of breath
How Is It Diagnosed?
Healthcare providers diagnose polymyositis through a combination of physical exams, symptom review, and specialized testing.
Tests may include:
- Blood tests
- MRI scans
- Electromyography (EMG)
- Muscle biopsy
These tests help evaluate muscle inflammation, measure muscle damage, and rule out other conditions that can cause weakness.
How Is It Treated?
Although there is no cure for polymyositis, treatment can help reduce inflammation, improve muscle strength, and support daily activities.
Treatment options may include:
- Corticosteroid medications
- Immunosuppressive medicines
- Physical therapy
- Exercise programs
- Supportive care for swallowing or breathing problems
Recovery varies from person to person. Some people respond well to treatment, while others may need long-term care to manage symptoms and prevent complications.
