Myositis
Causes of Myositis
Myositis is caused by any condition that leads to inflammation in the muscles. Myositis causes can be divided into several categories:
Inflammatory conditions. Conditions causing inflammation throughout the body may affect the muscles, causing myositis. Many of these causes are autoimmune conditions, in which the body attacks its own tissues. Inflammatory conditions causing potentially severe myositis include:
- Dermatomyositis
- Polymyositis
- Inclusion body myositis
Other inflammatory conditions tend to cause milder forms of myositis, including:
- Lupus
- Scleroderma
- Rheumatoid arthritis
Inflammatory conditions are often the most serious myositis causes, requiring long-term treatment.
