Schizophrenia is a serious mental illness, and careful recognition of early symptoms of schizophrenia is particularly important, and early detection and intervention in schizophrenia has been valued as a new and promising approach. Most patients already have some period of early symptoms of nonspecific, nonpsychotic symptoms prior to the onset of psychosis. Specific manifestations include: 1. sleep changes: gradually or suddenly becoming difficult to sleep, waking easily or not sleeping deeply, having nightmares throughout the night, or sleeping excessively. 2, emotional changes: emotions become indifferent, lose the previous enthusiasm, do not care about relatives, lack of proper emotional communication and alienation from friends, not interested in the surrounding things, or lose temper over the smallest thing, inexplicably sad and tears or elated, etc. 3, abnormal behavior: behavior gradually becomes bizarre, secretive or incomprehensible, like to be alone, uncomfortable chasing the opposite sex, unashamed, self-talking and laughing, lazy life, dazed and dazed, sleeping with their heads covered, wandering out, not returning home at night, etc. 4.Sensitive and suspicious: very sensitive to everything, linking some ordinary things around him with him, thinking that it is directed at him. If others are talking, they think they are talking about him; if others occasionally look at him, they think they have bad intentions. Some even think that the contents of the radio, television, newspapers are related to him, watching the words, paying attention to the every move of others, some think that someone wants to harm him, afraid to drink, eat, sleep, some think that the lover is unfaithful to him and stalking. 5, personality change: the original lively and cheerful, hospitable people, become silent, sitting alone seems to be thinking about the problem, do not interact with people; always clean and sharp people become unkempt, lazy life, loose discipline, do not focus; the original rule-based people become often late, early, unexplained absenteeism, sloppy work, do not care about criticism; the original frugal people, become wasteful and wasteful The person who was frugal becomes wasteful and wasteful, and is not interested in things that are of great interest. 6, language expression abnormal: with the conversation topic is not much, simple statements, monotonous content, the content of the conversation lacks the center or in the conversation to say something unrelated to the conversation, so that people can not understand, feel that the conversation effort or inexplicable, or talking to themselves, repeatedly repeat the same content. 7.Detachment from reality: indulging in fantasy, daydreaming. Hallucinations or delusions may occur.