More than 2 million Americans a year experience this disorder. It is equally common in men and women. Schizophrenia tends to appear earlier in men than in women, showing up in their late teens or early 20s as compared to their 20s or early 30s in women. Schizophrenia often begins with an episode of psychotic symptoms like hearing voices or believing that others are trying to control or harm you. The delusions— thoughts that are fragmented, bizarre, and have no basis in reality—may occur along with hallucinations and disorganized speech and behavior, leaving the individual frightened, anxious, and confused. There is no known single cause of schizophrenia. Treatment may include medications and psychosocial support like psychotherapy, self-help groups, and rehabilitation.