The disease is treated with anti-inflammatory medicines called corticosteroids. You may also take drugs to suppress the immune system such as methotrexate, azathioprine, and hydroxychloroquine to treat the skin rash.
If the condition does not respond to these medicines, other drugs that suppress the immune system may be tried.
When your muscles get stronger, your doctor may tell you to slowly cut back on your doses. Most people with this condition must take a medicine called prednisone for the rest of their lives.
If a cancer is causing the condition, the muscle weakness and rash may get better when the tumor is removed.