Some studies claim that eating disorders have a narcissistic character and this makes treating eating disorders difficult. In this study, I try to explain the narcissism in eating disorders by previous research. The results indicate that narcissism in eating disorders is perceived as grandiose and withdrawing from external objects, and that eating disorders are a form of self-control to satisfy the subject's narcissistic world. However, there are a lack of self, self-insufficiency, and the fear of being evaluated evaluated by others, behind their narcissism. Furthermore, there is self-alienation in eating disorders from the perspective of Lacan's mirror stage, so suffers have difficulties concerning themselves with others. Finally, I conclude that because we have a relationship with them as their therapist, we have to deal with their alienation and our being alienated by them.