Fibromyalgia is classified as what type of syndrome?

Fibromyalgia is classified as a chronic non-inflammatory syndrome. This classification is accurate because fibromyalgia is characterized by widespread musculoskeletal pain, fatigue, and tenderness in localized areas, without an underlying inflammatory process or significant joint or muscle tissue damage. Moreover, the absence of inflammation distinguishes it from other conditions that might cause similar symptoms, such as arthritis, which involve inflammatory pathways.

Patients with fibromyalgia often report a variety of symptoms that can include sleep disturbances, cognitive difficulties (sometimes referred to as "fibro fog"), and emotional distress, all of which contribute to its chronic nature. The condition is believed to result from abnormal pain processing in the brain and nervous system rather than from inflammation or autoimmune responses, which further solidifies its classification as a chronic non-inflammatory syndrome.