Inflammation of fibrous and muscle tissue, causing pain, stiffness, and weakness in affected areas.
From fibro- + my- (Greek mys, 'muscle') + -itis (Greek, 'inflammation'). This medical term emerged in the late 1800s as doctors recognized distinct inflammatory conditions affecting muscle and connective tissue.
Fibromyitis was historically a catch-all diagnosis before modern imaging—doctors threw it at any mysterious muscle and tissue pain, making it a perfect storm of inflammation doctors couldn't quite pin down.
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