How to treat narcissistic personality disorder

For people with narcissistic personality disorder, usually to learn self-suggestion, warning themselves is not a child, there are many things waiting for themselves to do, I want to belong to their own things, can not envy others. In addition to learn to love others, love is mutual, if you want to get love, it must first learn to pay, can not think of themselves as superior, more than a love for others, narcissism will naturally ease.