Dermatomyositis and Polymyositis
Dermatomyositis (DM) and polymyositis (PM) are rare conditions. They are thought to be caused by an overactive immune system attacking normal, healthy tissue. They can cause inflammation, swelling, and other problems.
Dermatomyositis causes weakness in the skeletal muscles—thighs, torso, shoulders, hips, and upper arms. It also causes a distinctive rash around the eyes and skin of the joint areas.
Polymyositis causes weakness in the skeletal muscles—thighs, torso, shoulders, hips, and upper arms—but does not usually cause a rash, as dermatomyositis does.
More from DM/PM & YOU
Get answers to some questions about DM or PM.
Living with dermatomyositis since 2012
“Live life and don’t let this disease ever define who you are.”
Learn about the tests to confirm if you have DM or PM.
Treating dermatomyositis and polymyositis.
Learn about your treatment options.
DM and PM.
Get the facts about how dermatomyositis and polymyositis can affect your muscles and impact your body.
Some types of viruses may cause muscle inflammation, which occurs in DM and PM.
A diet that’s high in protein may help a person with polymyositis manage his or her condition. Always talk to your doctor before making a change to your diet.
Many treatments for dermatomyositis and polymyositis work to block your immune system from attacking healthy tissue.
The immune system’s response to an injury that results in pain, redness, and swelling.
Protein is found in every part of our body and is needed to build and maintain bones, muscles, and skin. Protein can be found in meats, fish, eggs, and dairy products.