The various symptoms of psychosis are the various manifestations of abnormal mental activity, mainly including perception, thinking, emotion, volitional behavior, and cognitive activity. For example, patients can have sensory hypersensitivity, which is an overreaction to light or sound, or hypoesthesia, which is a reaction to a large stimulus. Perceptual disorders are mainly seen in hallucinations, such as verbal hallucinations, as well as hallucinations of vision, touch, taste, etc. Patients can feel sounds, images, and smells that do not actually exist. Second, thinking disorder, thinking disorder can be divided into thinking content disorder, thinking form disorder, etc.. The main content disorder is delusion, which is the patient’s distorted perception of facts, such as relationship delusion and delusion of victimization. Patients feel that everything that happens around them is related to them, that they are being followed or watched, or that someone is trying to harm them. Disorders of thought form, patients mainly manifest incoherent speech, or speak incoherently, there is no way to make others understand what he is saying, some patients also appear to be poor in thought, that is, the brain is blank, do not know what to say. Third, abnormal emotions, patients can appear emotional high, cheerful, can also appear very low emotions, or even flat, indifferent. Fourth, the will behavior disorder, patients can appear will enhancement or will reduction. Enhanced consciousness appears in the state of excitement, agitation or mania; patients with depressed will mostly show withdrawal, avoidance and other behaviors. Fifth, cognitive impairment, cognitive impairment is mainly memory, attention, orientation disorders. Patients can manifest as inattention or overconcentration, or as memory loss and errors in judgment of time, place and people.