Pain is the physical sensation of discomfort or distress caused by injury[?] or illness.
Physical pain is felt by nerves in the body sending signals to the brain. Patients with spinal cord injuries who have the nerves of their lower body severed from their brain cannot feel pain in the lower body.
Not all nerves can detect pain. There are no pain receptors in the brain itself. There are two types of pain: chronic and acute.
Acute pain is roughly defined as short-term pain or pain with an easily identifiable cause. Acute pain is the body's warning of current damage to tissue or disease. It is often fast and sharp followed by aching pain. Acute pain is centralized in one area before becoming somewhat spread out. This type of pain responds well to medications.
Chronic pain is roughly defined as long-term pain or pain that isn't necessarily associated with any form of injury or disease. This constant or intermittent pain has no known purpose, as it doesn't help the body to prevent injury. It often doesn't respond well to medications. Expert knowledge and/or skills may be necessary to treat chronic pain adequately. When analgesics are used indiscriminately, addictions to narcotics may occur.
See also:
- Analgesics: Drugs which reduce pain.
- Anaesthesia: complete elimination of pain by inducing unconsciousness
- Local anesthesia: anesthetic techniques limited to specific parts of the body
- Nociception: the ability of an organism to sense pain
- Psychological pain: Emotional pain and related psychological conditions.
- Algolagnia: the paraphilia of deriving pleasure from certain kinds of pain
- Motivation: the human brain tries to avoid pain and seeks pleasure
Common misspelling and questions (FAQ)
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