Fibromyalgia (FM) is a chronic pain disorder characterized by widespread pain, fatigue and sleep disturbances. It was originally thought to be a musculoskeletal disorder since most of the pain was felt in the muscles and other soft tissues. However, recent research and the advancement of brain-imaging technology is revealing that fibromyalgia is actually a disorder of the central nervous system, which causes abnormal pain processing and results in pain amplification.
