Nick Cannon has been diagnosed with a health condition that he is opening up about. Nick Cannon has revealed he was diagnosed with narcissistic personality disorder (NPD) after undergoing tests to better understand his mental health.He acknowledged identifying with traits like “lack of empathy” and “rage” but emphasized his commitment to healing and being a better father to his 12 children. Cannon, who also has ADHD and dyslexia, hopes sharing his journey will encourage others to embrace therapy and mental health awareness.