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edition.cnn.com/HEALTH/li...00034.html
Quote:
From MayoClinic.com
Special to CNN.com
Chronic pain may develop for no apparent reason. Despite repeated examinations and tests, your doctor may not be able to link it to an identifiable physical cause or condition. This doesn't mean that the pain doesn't exist. Pain is, by its very nature, subjective. It is not tangible. X-rays and lab tests can't "see" pain.
Your pain may be associated with factors that are difficult to diagnose. It's also possible that the normal method of pain processing has been disturbed in your brain or spinal cord. For example, your pain could be similar to the phantom pain some amputees feel in their amputated limbs. Even subtle damage to nerves can cause severe pain.
How you feel pain
Phantom pain
Controversial syndromes
Years of research have failed to uncover the precise physical causes of a variety of painful ailments, including:
Fibromyalgia (all-over aches, with worse pain at specific tender points)
Chronic fatigue syndrome (fatigue and all-over aches)
Irritable bowel syndrome (abdominal pain, constipation or diarrhea)
Interstitial cystitis (bladder pain)
Vulvodynia (pain in the female external genitals)
In some people, two or more of these problems occur simultaneously. This leads researchers to believe that there may be a common cause linking some of these disorders, which occur primarily in women.





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