Identification

• Symptoms are rare in the early stages of polymyositis. As the disease progresses, a person will likely notice muscle weakness in his hips, thighs, shoulders and neck. Other symptoms include difficulty swallowing, joint pain and tiredness.
  
  

Risk Factors

• According the the Mayo Clinic, the cause of polymyositis is unknown. However, doctors believe infections (bacterial and viral) and genetics play a major role in this illness.
  
  

Diagnosis

• To diagnose polymyositis, a doctor will take a blood sample to check muscle enzyme levels. If levels are higher than normal, the doctor will likely schedule an MRI or do a muscle biopsy to check for the disease.
  
  

Treatment

• Corticosteroids such as prednisone are commonly prescribed to stop inflammation and to treat polymyositis. Rest and exercise are also imperative. Exercise strengthens weak muscles, and adequate rest combats fatigue.
  
  

Considerations

• Remission periods are rare but possible with polymyositis. During these periods, symptoms noticeably decline or disappear.