Interestingly, several studies have found that men are more often diagnosed with Narcissistic Personality Disorder (NPD).
Research also suggests that men are more likely than women to display certain narcissistic traits. Approximately 50–75% of people diagnosed with NPD are men. But, narcissism exists in both men and women and may present differently.

Reference:
Grijalva, E., et al. (2015). Gender Differences in Narcissism: A Meta-Analytic Review. Psychological Bulletin, 141(2), 261–310.

If psychology suggests that narcissistic traits can sometimes develop through deep insecurity, unhealthy coping mechanisms, or difficult childhood experiences, then I’d like to ask all of you a question:

What can we, as adults, parents, and caregivers, do to help ourselves and those around us become emotionally healthy, humble, and resilient individuals?