For example, when we have a cut, the body sends fluid to the affected area so that white blood cells can fight off any infection. One feature of a healthy immune system is inflammation. However, in people who have autoimmune conditions, the immune system gets confused and mistakenly attacks the body’s own healthy tissues. When healthy, it protects us from infection, injury and illness. The immune system is the body’s natural self-defence system. Polymyositis, dermatomyositis, as well as other types of myositis, are autoimmune conditions. This type doesn’t often affect other parts of the body much.ĭermatomyositis causes similar symptoms in muscles, but there is also a skin rash. Polymyositis means that many muscles are affected by inflammation.
The two most common types are polymyositis and dermatomyositis. Sometimes myositis can affect the muscles that carry out tasks such as breathing and swallowing. Having myositis can also lead to other parts of the body being affected, such as the skin, lungs or heart. The main muscles to be affected are around the shoulders, hips and thighs. Myositis can affect people of any age, including children. If something is inflamed, it may be swollen. The word myositis simply means inflammation in muscles. Myositis is the name for a group of rare conditions that can cause muscles to become weak, tired and painful.
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