hello, schizophrenia Can't be cured, but treatment may help it is Chronic: can last for years or be lifelong The exact cause of schizophrenia isn't known, but genetics, environment, and imbalanced brain chemicals may play a role. Schizophrenia is characterised by abnormal social behaviour. In severe cases, patients may see or hear things that aren't real. Treatment is usually lifelong and often involves a combination of medications and psychological and social therapy. And herediatery(from parents) schizophrenia has very poor outcome. please consult your psychiatrist behavioral therapy may help him to quit smoking.