What are polymyositis and dermatomyositis?
Polymyositis and dermatomyositis are autoimmune conditions in which the immune system attacks the body's own tissues causing inflammation in the muscles. Read more
What are the symptoms of polymyositis and dermatomyositis?
Symptoms of polymyositis and dermatomyositis include weak, tired and inflamed muscles, and generally feeling unwell. Dermatomyositis also causes a rash and swollen skin, causing puffiness and colouring around your eyes. Read more
Who gets polymyositis and dermatomyositis?
Polymyositis and dermatomyositis are rare diseases, affecting only 6–8 people out of 100,000. They mostly affect adults, although children can be affected by a type of dermatomyositis (juvenile dermatomyositis). Read more
What causes polymyositis and dermatomyositis?
Polymyositis and dermatomyositis are autoimmune diseases where your immune system, which normally protects your body against infections, attacks your body’s own tissues. This causes inflammation in your muscles and skin. We don’t yet know why this happens. Read more
What is the outlook for polymyositis and dermatomyositis?
Even severe cases of polymyositis and dermatomyositis respond to treatment, so the outlook is good. But your muscle strength may take longer to recover. Read more
What are the possible complications of polymyositis and dermatomyositis?
Polymyositis and dermatomyositis can have some severe complications. It’s important to be aware of these and the symptoms they may cause. Read more
How are polymyositis and dermatomyositis diagnosed?
The diagnosis of polymyositis or dermatomyositis may require an examination, blood tests, an electromyography (EMG) test, muscle biopsy or an MRI scan of the affected muscles. Read more
What are the other types of myositis?
Other types of myositis include post-infectious reactive myositis and inclusion body myositis (IBM). Read more
What treatments are there for polymyositis and dermatomyositis?
Treatments for polymyositis and dermatomyositis include steroids and sometimes disease-modifying anti-rheumatic drugs (DMARDs) or infusions of immunoglobulin, along with exercise and physiotherapy.
Research and new developments for polymyositis and dermatomyositis
A study is looking at the effectiveness of steroids in various combinations with other drugs with the aim of finding the best combination of drugs for treating polymyositis and dermatomyositis. Read more