unpleasant sensory and emotional experience associated with
actual or potential tissue damage or described in terms of such damage.
It is useful to distinguish between two basic types of pain, acute and
chronic, and they differ greatly.
Acute pain, for the most part, results from disease, inflammation,
or injury to tissues. This type of pain generally comes on suddenly
(e.g., after trauma or surgery) and may be accompanied by anxiety or
emotional distress. The cause of acute pain can usually be diagnosed…
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