Chronic pain and fatigue syndromes: overlapping clinical and neuroendocrine features and potential pathogenic mechanisms.
Clauw, D J, Chrousos, G P·Neuroimmunomodulation·1997
This review examines fibromyalgia and chronic fatigue syndrome, two conditions with overlapping symptoms of pain and exhaustion that have been described throughout medical history under different names. The authors propose that both conditions stem from problems in the central nervous system—the brain and spinal cord—particularly in areas that control hormone levels, pain sensing, and automatic body functions. They suggest that immune system changes seen in these conditions are side effects rather than root causes.