Psychologists at the University of California, Los Angeles say the human body has a gene which connects physical pain sensitivity with social pain sensitivity.
The findings back the common theory that rejection 'hurts' by showing that a gene regulating the body's most potent painkillers - mu-opioids - is involved in socially painful experiences too.
Their study indicates that a variation in the mu-opioid receptor gene (OPRM1), often associated with physical pain, is related to how much social pain a person feels in response to social rejection.
People with a rare form of the gene are more sensitive to rejection and experience more brain evidence of distress in response to rejection than those with the more common form.
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