what causes a narcissist
As with other mental disorders, the cause is likely complex. Narcissistic personality disorder may be linked to: 1  Mismatches in parent-child relationships with either excessive pampering or excessive criticism.2  Genetics or psychobiology â the connection between the brain and behavior and thinking.3  Symptoms.4  Risk factors.s with other mental disorders, the cause is likely complex. Narcissistic personality disorder may be linked to: 1  Mismatches in parent-child relationships with either excessive pampering or excessive criticism. 2  Genetics or psychobiology â the connection between the brain and behavior and thinking. 3  Symptoms. 4  Risk factors.