Diseases > Dermatomyositis (DM)
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Dermatomyositis (DM) is a disease that affect muscles. This diseases causes inflammation in the muscles. This causes weakness of the muscle. It is important to know that the muscles affected are not painful. They are weak but not painful. Dermatomyositis also causes a rash.
To keep things easier we’ll discuss polymyositis and dermatomyositis together. We’ll refer to both PM and DM as simply myositis. In fact they are both types of inflammatory myopathies.