| Fibromyalgia is a chronic disorder characterized by | | | | triggers of the disorder. Some scientists believe that |
| widespread musculoskeletal pain, fatigue, and multiple | | | | the syndrome may be caused by an injury or trauma. |
| tender points. "Tender points" refers to tenderness | | | | This injury may affect the central nervous system. |
| that occurs in precise, localized areas, particularly in | | | | Fibromyalgia may be associated with changes in |
| the neck, spine, shoulders, and hips. People with this | | | | muscle metabolism, such as decreased blood flow, |
| syndrome may also experience sleep disturbances, | | | | causing fatigue and decreased strength. Others |
| morning stiffness, irritable bowel syndrome, anxiety, | | | | believe the syndrome may be triggered by an |
| and other symptoms. | | | | infectious agent such as a virus in susceptible people, |
| Although the cause of fibromyalgia is unknown, | | | | but no such agent has been identified. |
| researchers have several theories about causes or | | | | |