Final answer:
Schizophrenia is a serious mental illness with positive symptoms like hallucinations and negative symptoms including an expressionless face. Treatment usually involves antipsychotic medications that work by blocking dopamine receptors in the brain. The illness typically manifests in late adolescence or early adulthood.
Step-by-step explanation:
Schizophrenia is a chronic mental health condition characterized by a range of symptoms. One of the positive symptoms of schizophrenia is hallucinations, which involve sensing things that are not there, such as hearing voices. In contrast, an expressionless face or blunted affect, as well as a lack of guilt feelings, would be categorized as negative symptoms. These negative symptoms denote a decrease or loss of functions or emotions.
Treatment typically involves antipsychotic medications that aim to manage symptoms by targeting and blocking dopamine receptors in the brain. These medications are crucial for many patients to manage their condition, although they are not a complete cure and often require lifelong adherence. The onset of schizophrenia commonly occurs in late adolescence or early adulthood, affecting about one percent of the population in the United States.