Hallucinations belong to a kind of psychiatric symptoms, see more things, depending on the type of mental illness, see different things in general, as follows: 1, too much psychoactive substances: such as psychoactive substances, alcohol addicted psychiatric patients, may see some flowers, plants, insects, etc., such hallucinations are more vivid and distinct. 2, cultural mental disorders: if it is schizophrenia or with In the case of schizophrenia or culture-related mental disorders, they may see dead people or people who are in conflict with them to persecute them, and so on. Therefore, the content of hallucinations varies from one psychiatric symptom or disorder to another, and the content of hallucinations varies according to each person’s past experiences and the characteristics of their own illness.