Schizophrenia is a chronic and severe mental disorder that affects how a person thinks, feels, and behaves. People with schizophrenia may seem like they have lost touch with reality. Schizophrenia symptoms include distorted thoughts, hallucinations, and feelings of fright and paranoia. Psychiatrists evaluate symptoms, tests, and medical history, and prescribe medications and psychotherapy for treatment. The vast majority of people with schizophrenia are not violent and do not pose a danger to others. Although schizophrenia can occur at any age, the average age of onset tends to be in the late teens to the early 20s for men, and the late 20s to early 30s for women. It is uncommon for schizophrenia to be diagnosed in a person younger than 12 or older than 40. It is possible to live well with schizophrenia.