Of course, the human condition is characterized by the presence of a second, the other person, but whether this person is real, as when one mental disorder? These and other questions need to be answered.
Without a doubt alter ego is the mental state of the person at which it occurs is completely different, different personality, which is reflected in literature, cinema, art. The reason for the development of this condition are unfulfilled dreams of the person, his vital needs, which are not received due to certain reasons of its further development. But the following problem arises: is alter ego one of the types of mental disorder, and multiple personality disorder – is it dangerous?
Split personality is characterized by the presence of another type of man. That is a completely different way of thinking, with other stereotypes and other values in life. As for alter ego, it likely is not a mental disorder. Why?
The thing is that the second "I" person in this situation does not go beyond personal limits. It is just subconscious, in the dreams of a person. It can be an imaginary actor or a poet, or a musician, like him. It's a "false" personality, a "false" dichotomy. It is not dangerous and cannot lead to any serious change in the psyche of someone who's alter ego is.
This is a very interesting state that in science today requires a more serious consideration and study. Dark side alter ego has not been studied, not studied. They are still the fruit of research for many scientists and psychiatrists.