Hi ♫
Narcissism is only a symptom, most time it's from a neurosis. And we know that a neurosis can be fixed with a Psychoanalyst ( **not a psychologist, nor a psychiatrist ). If we remove the cause(s) of the neurosis, the symptom disappears and many others yet, not only the narcissism so.
Have a nice day and happy Halloween !
Catherine
** Psychologists and psychiatrists are not adapted for treat the neurosis, because they don't ' go ' deeply in the subconscious for find the causes.