Narcissistic Personality Disorder (NPD) – Symptoms and Causes. Learn about narcissistic traits, behaviors, and underlying causes, including genetics, trauma, and personality factors. Improve mental health with therapy, mindfulness, and support. Our customer service team is available seven days a week from 7:15 a.m. to 6:15 p.m. Visit www.hupcfl.com or call +1 800 457 4573. https://hupcfl.com/narcissistic-personality-disorder-symptoms-and-causes/