Schizophrenia is a severe brain disorder that makes it difficult to distinguish between reality and fantasy. Symptoms vary but can include abnormal social behavior, cognitive issues like delusions or hallucinations, mood swings, and psychological problems. While there is no cure, treatment through medication, therapy, and lifestyle changes can help manage symptoms. Schizophrenia is usually diagnosed by a medical professional and believed to have genetic and environmental causes. It most commonly develops in late adolescence and early adulthood.