Schizophrenia is a chronic mental illness affecting about 1.1% of the global population, characterized by disordered thoughts and behaviors, with symptoms including delusions and hallucinations. It can be diagnosed through observation of symptoms and ruling out other conditions, and is treated through a combination of antipsychotic medications and psychosocial interventions. Prognosis varies, but with treatment and support, many individuals lead productive lives despite the challenges of the disorder.