Emotions raise level of pain
Emotions may determine why some people are more likely to suffer chronic pain than others, a study has found.
The state of the brain can explain why different individuals do not respond the same way to similar injuries, say scientists.
Some recover fully while others remain in constant pain.
Brain scan studies showed for the first time how chronic pain emerges as a result of an emotional response to an injury.
Professor Vania Apakarian, from Northwestern University in Chicago, US, said: "The injury itself is not enough to explain the ongoing pain."
The more emotionally the brain reacted to the injury, the more likely it was that pain will persist after the injury has healed, he said.