Schizophrenia
Schizophrenia, also sometimes called split personality disorder, is a chronic, severe, debilitating mental illness that affects about 1% of the population, corresponding to more than 2 million people in the United States alone. Other statistics about schizophrenia include that it affects men about one and a half times more commonly than women. It is one of the psychotic mental disorders and is characterized by symptoms of thought, behavior, and social problems. The thought problems associated with schizophrenia are described as psychosis, in that the person's thinking is completely out of touch with reality at times. For example, the sufferer may hear voices or see people that are in no way present or feel like bugs are crawling on their skin when there are none. The individual with this disorder may also have disorganized speech, disorganized behavior, physically rigid or lax behavior (catatonia), significantly decreased behaviors or feelings, as well as delusions, which are ideas about themselves or others that have no basis in reality (for example, experience the paranoia of thinking others are plotting against them when they are not).medicinenet.com