Elderly people have hallucinations and always see people, medically known as hallucinations. The appearance of hallucinations is generally seen in the following diseases: 1. Alzheimer’s disease, hallucinations, hallucinations and other symptoms are mostly seen in the middle and late stages of Alzheimer’s disease, which is a form of abnormal mental behavior, patients can also be accompanied by delusions of victimization, appearing self-injurious and hurtful behavior. 2. mental illnesses, such as schizophrenia, hysteria, etc. 3. anxiety, depression. This is a manifestation of somatization disorder. Patients are often accompanied by insomnia, excessive dreaming, decreased appetite, and emotional tension. If elderly people have hallucinations, they should actively look for the cause, ensure good sleep quality, keep their mood relaxed and avoid the influence of negative life events. Olanzapine, risperidone or donepezil can be given for antipsychotic symptoms and antidementia treatment in severe symptoms.