According to a US study, it may be due to emotions why some people suffer chronic pain more than others.

Scientists have stated that the emotional state of the brain can be behind different reactions to similar injuries. Some people are in constant pain whereas some recover completely.

For the time ever, it has been seen that how an emotional response to an injury is the reason for chronic pain.

Frontal cortex and nucleus accumbens are the two regions of the brain where an interaction takes place in the process.

Lead scientist Professor Vania Apakarian, from Northwestern University in Chicago, 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. The more emotionally the brain reacted to the initial injury, the more likely it was that pain will persist after the injury has healed."

He further added that there are chances that in some people these sections of the brain are more excited or due to genetic and environmental influences that predispose these brain regions to interact at an excitable level.