Answer:
Schizophrenia
Explanation:
Schizophrenia is a critical mental health illness that affects the functionality of a person. This illness is usually causes major mood episode (manic or depressive mood). The diagnosis of this illness is challenging. But some symptoms of this illness include delusions, disorganized thinking, hallucinations , anosognosia, disorganized speech , social withdrawal.
These symptoms usually appear before the age of 40.