This condition can affect both children and adults, but there are some differences between the two groups.
Learn more about narcissism in children, including symptoms, causes, and treatment options.
However, there are some differences between the two groups, and things to consider whennarcissistic personality disorderis suspected.

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It becomes more of a concern when these traits are still present afterpuberty.
Children as young as 2 years old can show signs of narcissism.
These include:
Causes
Causes of narcissistic personality disorder in children are not entirely understood.
It is believed to be linked to biological factors (such as genetics) and environmental factors.
However, there is also some contradiction in research about environmental and parental influences of narcissism.
A child is more likely to develop NPD if they believe that they are special compared to other children.
However, parents can make changes to their parenting behaviors and interactions to help their kids overcome narcissistic tendencies.
Psychotherapy (talk therapy) is a treatment option for NPD and early signs of narcissism in children.
Changes in parenting styles is another option specifically when addressing childhood NPD.
Summary
Narcissistic personality disorder is a mental health condition affecting children and adults.
It involves entitlement, an inflated sense of self, and interpersonal and relationship challenges.
Professional support from a child psychologist or therapist can help guide treatment and parenting changes.
American Psychological Association.Narcissistic personality disorder.
American Psychiatric Association.Diagnostic and statistical manual of mental disorders, fifth edition.
Washington, DC: American Psychiatric Publishing; 2013.
2015;112(12):3659-3662. doi:10.1073/pnas.1420870112
Mitra P, Fluyau D.Narcissistic personality disorder.
StatPearls Publishing; 2021.