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PAIN, an unpleasant sensory and emotional experience associated with…

- - - - Chronic pain
        Due to continuous stimulation of nociceptive receptors e.g. cancer pain resulting from tissue damage by cancer. Sometimes referred to as physiological pain
        The neurons function normally sending signals about tissue damage
        Chemical changes in damaged cells ‘waken’ peripheral nociceptors- resulting in primary hyperaglesia (excessive sensitivity)
        Described as dull, aching, throbbing, rarely sharp
        Example – cancer, physiological pain
    - - Chronic pain
        Produced by pathological neural activity
        The pain is a disease because it is independent of stimulation of nociceptive endings
        Often has no biological function - chronic back pain may be caused by abnormal pain processing rather than current neuromuscular injurySelf-sustaining and duration exceeds expectations
        Usually described as burning, shooting, tingling, electrical, lightning sensations
      - Examples:
        Phantom limb pain
        Fibromyalgia
        Visceral pain conditions
        Non-specific back pain
        Spinal cord injury pain
        Complex regional pain syndrome (CRPS)