It is referred to as split personality disorder, schizophrenia is a chronic, severe, debilitating mental illness.
The most common early warning signs or symptoms include:
Depression, social withdrawal.
Hostility or suspiciousness, extreme reaction to criticism.
Deterioration of personal hygiene.
Flat, expressionless gaze.
Inability to cry or express joy or inappropriate laughter or crying.
Oversleeping or insomnia; forgetful, unable to concentrate.
Odd or irrational statements; strange use of words or way of speaking.
Alcohol and other drug use.