When you first meet them, narcissists can seem confident and charismatic - exactly the kind of person you'd want to date or work with.
But once you get to know them more, their negative qualities bubble to the surface, making it hard to sustain deep relationships with them.
We reviewed the psychological research and rounded up some of the most common traits of narcissists. Read on to find out if you or someone you know might be one.
Mike Nudelman/Business Insider