Emotions may determine why some people are more likely to suffer chronic pain than others.
The emotional state of the brain can explain why different individuals do not respond the same way to similar injuries, scientists have said in a study.
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.
Lead scientist Professor Vania Apakarian said: “The injury itself is not enough to explain the ongoing pain. It has to do with the injury combined with the state of the brain.”