Symptoms and causes
Schizophrenia involves a range of problems with thinking, behavior or emotions. Signs and symptoms may vary, but usually involve delusions, hallucinations or disorganized speech, and reflect an impaired ability to function. The effect can be disabling.
Schizophrenia symptoms generally start in the mid- to late 20s. It’s uncommon for children to be diagnosed with schizophrenia. Early-onset schizophrenia occurs before age 18. Very early-onset schizophrenia in children younger than age 13 is extremely rare.
Symptoms can vary in type and severity over time, with periods of worsening and remission of symptoms. Some symptoms may always be present. Schizophrenia can be difficult to recognize in the early phases.