Idiosyncrasy is a painful reaction, intolerance, a concept that passed into psychology from medicine. Psychological idiosyncrasy manifests itself as a feeling of rejection, anger, irritation, as a feeling of inability to experience, to come into contact with an intrapsychic object (which may or may not be conscious), characterized by a reaction of increased excitability. Anxiety disorder, be it social phobia, agoraphobia, panic or post-traumatic disorder has in its structure many mental and physiological mechanisms that support it, which interact with each other. Idiosyncrasy is something that becomes overgrown with cognitive patterns, coping strategies, and habitual behavioral reactions, which together form a disorder. This is the very core that generates internal tension. Since we live in a world of concepts and relationships, our brain creates concepts for everything. He finds explanations and builds chains of relationships for all events that occur, including internal ones. For example, a person is afraid of dogs; in the past he had a negative experience with an animal. The dog attacked him and bit him. He developed a fear of dogs. Seeing a dog nearby, a person begins to feel anxious; thoughts arise about the dog possibly approaching him, about the fact that the animal may be aggressive, about a possible repetition of the negative event. An individual conceptual picture of the relationship between man and dog is recreated. At the same time, idiosyncrasy is hidden under the veil of mental and emotional processes determined by this concept. If, from the entire flurry of experienced phenomena of this person, at the moment of subjective danger, we isolate intolerance, then it would look like only: a) the brain’s interpretation of this situation; b) signaling of danger by strong arousal, using neurophysiological and physiological mechanisms; c) coping response. Considering idiosyncrasy as a psychological phenomenon of non-acceptance, one should pay attention to habituation, or mental habituation. Habituation is the continuation of a line of behavior without attention to the stimulus, perceiving it as insignificant. That. If a person encounters an idiosyncratic trigger and, despite the danger signaling system, remains in contact with the stimulus, addiction occurs. Together with habituation, learning occurs to respond in a different way to previously idiosyncratic triggers (not only in a physiological context, but new beliefs arise regarding an object that previously caused emotional arousal - “this is not dangerous”) A case from practice. The girl has an anxiety disorder and an idiosyncratic trigger was identified, which was the inability to hold her gaze in a situation of mutual gaze with another person. During exposure therapy, the task was to meet other people's gaze and not look away. Before completing the task, the instruction was given - “now I will face my idiosyncratic trigger. All I will experience are just bursts of neural activity, neural noise.” To help, to refrain from conceptually processing the situation, the girl used concentration on breathing and detached awareness. As a result, habituation was achieved.