[Brownskin S]

myositis - a rare disease whereby the immune system attacks the muscles associated with the outer limbs of the body

[Bob]

Myositis is a general term for inflammation of the muscles.Many are considered likely to be caused by autoimmune conditions, rather than directly due to infection (although autoimmune conditions can be activated or exacerbated by infections.)Elevation of creatine kinase in blood is indicative of myositisTypes of myositis include:myositis ossificansfibromyositisidiopathic inflammatory myopathiesdermatomyositisjuvenile dermatomyositispolymyositisinclusion body myositispyomyositis

[Kitty]

Myositis is an auto-immune disease which you are right. This disease is treated by high dose of steroids which normally doctor will prescribed to the sufferer. Is a long term disease just like SLE but this is dangerous if happen in myocardial which is the muscle of the heart, the patient may be die of heart arrest when the attacks go to myocardium.