Why do some people have chronic pain and others with similar injuries or disability do not?

Research shows that pain experience has physical, cognitive, motivational, and emotional factors. Research also demonstrates that persons with depression and catastrophizing will often display more pain behavior in response to pain. They are also more likely to avoid activity for fear of increased pain, which then leads to more disability.

Reference: 

M.J.L Sullivan. Toward a biopsychomotor conceptualization of pain: implications for research and intervention. Clin J Pain. 2008. Vol 24, Num 4 Pp.281-289.

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