Fibromyalgia

Fibromyalgia
(Fibrositis)

Medical Author: William C. Shiel Jr., MD, FACP, FACR

• What is fibromyalgia?
• What causes fibromyalgia?
• Who does fibromyalgia affect?
• What are symptoms of fibromyalgia?
• How is fibromyalgia diagnosed?
• What is the treatment for fibromyalgia?
• What is in the future for fibromyalgia therapy?
• Fibromyalgia At A Glance
• Related fibromyalgia articles:
  Fibromyalgia - on WebMD
  Fibromyalgia - on eMedicineHealth
  
• Read what your doctor is reading:
  Fibromyalgia - on Medscape

What is fibromyalgia?

Fibromyalgia is a chronic condition causing pain, stiffness, and tenderness of the muscles, tendons, and joints. Fibromyalgia is also characterized by restless sleep, awakening feeling tired, fatigue, anxiety, depression, and disturbances in bowel function. Fibromyalgia was formerly known as fibrositis.

While fibromyalgia is one of the most common diseases affecting the muscles, its cause is currently unknown. The painful tissues involved are not accompanied by tissue inflammation. Therefore, despite potentially disabling body pain, patients with fibromyalgia do not develop body damage or deformity. Fibromyalgia also does not cause damage to internal body organs. Therefore, fibromyalgia is different from many other rheumatic conditions (such as rheumatoid arthritis, systemic lupus, and polymyositis). In those diseases, tissue inflammation is the major cause of pain, stiffness and tenderness of the joints, tendons and muscles, and it can lead to joint deformity and damage to the internal organs or muscles.

What causes fibromyalgia?

The cause of fibromyalgia is not known. Patients experience pain in response to stimuli that are normally not perceived as painful. Researchers have found elevated levels of a nerve chemical signal, called substance P, and nerve growth factor in the spinal fluid of fibromyalgia patients. The brain nerve chemical serotonin is also relatively low in patients with fibromyalgia. Studies of pain in fibromyalgia have suggested that the central nervous system (brain) may be somehow supersensitive. Scientists note that there seems to be a diffuse disturbance of pain perception in patients with fibromyalgia.

Also, patients with fibromyalgia have impaired non-Rapid-Eye-Movement, or non-REM, sleep phase (which likely explains the common feature of waking up fatigued and unrefreshed in these patients). The onset of fibromyalgia has been associated with psychological distress, trauma, and infection.

Who does fibromyalgia affect?

Fibromyalgia affects predominantly women (over 80 percent) between the ages of 35 and 55. Rarely, fibromyalgia can also affect men, children, and the elderly. It can occur independently, or can be associated with another disease, such as systemic lupus or rheumatoid arthritis. The prevalence of fibromyalgia varies in different countries. In Sweden and Britain, 1 percent of the population is affected by fibromyalgia. In the United States, approximately 2 percent of the population have fibromyalgia.

Source: MedicineNet.com
http://www.medicinenet.com/fibromyalgia/article.htm