Overview
Pain is an unpleasant sensation triggered by the nervous system. The ability to experience pain is critical for survival because it can make us immediately aware of injury to the body. Pain is an individual experience affected by environmental, emotional, and cognitive factors.
Pain can be a symptom of illness, result from an injury, or occur with no apparent cause. Pain that results from illness or injury and tapers off or stops on its own or with medical treatment is called acute pain. Pain that persists after healing has occurred, results from long-term illness, or has no apparent cause is called chronic pain.
Chronic pain may persist for weeks, months, or years and may not respond to treatment. It can be debilitating and often becomes the defining factor in patients' lives. Without relief, or the hope for relief, many patients lose the ability to eat, sleep, work, and function normally.
Chronic pain can cause patients to alienate those around them and often leads to drug addiction, irritability, and depression. Physical, psychological, and emotional stress may worsen chronic pain.
According to the Centers for Disease Control and Prevention, chronic pain is the leading cause of disability in the United States. Chronic pain occurs in as many as 90% of cancer patients and often is undertreated.
Physician-developed and -monitored.
Original Date of Publication: 01 Jan 2000
Reviewed by: Stanley J. Swierzewski, III, M.D.
Last Reviewed: 01 Dec 2007
Chronic Pain, Overview, Incidence and Prevalence reprinted with permission from neurologychannel.com
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