Schizophrenia is a psychotic disorder characterized by disturbances in thought, perception, emotions, language, sense of self and behavior. Symptoms include delusions, hallucinations, disorganized speech and behavior, and negative symptoms such as lack of motivation and flat affect. It is thought to involve genetic vulnerabilities interacting with environmental stressors and imbalances in neurotransmitters like dopamine. Treatment involves antipsychotic medication combined with therapy and social skills training, though long-term outcomes vary significantly.