Progressive Kleist hallucinosis is a psychotic disease that is the most severe and chronic form. It occurs as a result of a neuroinfectious disease. The development of the disorder is characterized by affective symptoms: anxiety and fear, delirium, auditory, olfactory or tactile hallucinations, which are the most pronounced at the peak of symptoms. When hallucinatory experiences appear, the patient begins to rush from side to side, shouting words of illogical content. Nonsense does not have a logical sequence, clear statements and an unambiguous focus. At the peak of development, hypochondriacal mood progresses with complaints of poor sleep, depressive mood, and inability to relax. It may contain accusations against yourself and others. Hallucination attacks are more powerful when the patient is awake than at night. The nature of verbal deceptions of perception is pronounced, occurring when the eyes are closed or if the patient experiences an emotional outburst accompanied by fear or anxiety. An exacerbation of psychosis after psychogenic factors is extremely common: stress at home and at work, interpersonal conflicts and negative events. At times, in combination, objectively existing odors, lack of normal perception, and anxiety may be observed. An exacerbation of the condition involves a complete transition from the hallucinatory phase to the disoriented one. Subjectively, the patient observes auditory deceptions, flashing red dots with a slight blur