What exactly does Roman Sionis/Black Mask suffer from?

[Cortez2301]

I mean his whole theory about how people wear masks to cover their true faces, makes sense to me, but how do you explain the fact that he believes Black Mask is his Persona.I mean does he have a split personality disorder?

[M.O.D.O.K.]

You know, I never thought about that. I used to think he was a sociopath.

[GCFyouthcamper]

I'm not an expert on Black Mask. I only read the novelization of No Man's Land. In that book, Black Mask destroyed his face because he considered it the real mask or facade. So maybe it's like how Bruce Wayne's true personality and persona is Batman.

If I'm wrong, feel free to say so. Like I said, I'm not an expert on Black Mask.