Are fibromyositis or fibrositis related to fibromyalgia?

Fibromyositis and fibrositis are alternative names for fibromyalgia, a condition that causes chronic, widespread pain. Other symptoms of fibromyalgia include fatigue, insomnia, and depression. About 5 million Americans have fibromyalgia. Approximately 80 percent to 90 percent of people diagnosed with this condition are women.
No, fibromyalgia is associated with abnormalities within the pain processing areas of the brain. People with fibromyalgia have a hypersensitivity to pain without any physical changes to their muscles or other tissues. Fibromyositis is chronic inflammation of a muscle, and fibrositis is inflammation of the fibrous tissue which surrounds muscles. Both of these conditions may cause similar symptoms to some symptoms seen in fibromyalgia, however, with fibromyalgia there is no identifiable inflammation either through physical examination or any diagnostic or laboratory testing.

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