Mental cleanliness refers to a compulsive personality that a person holds in his or her own mental world, forcing his or her mental state to be absolutely clean, clean, and ready to clean up his or her mental world when confronted, so that the mental world is basically in a vacuum. This type of person can be clearly shown in the social aspect, with psychological cleanliness or the tendency to do so, will be very strict in their own social circle to scrutinize the people with whom they interact, once found to interact with people with any so-called dirty things, will immediately kick them directly out of their social circle. It is generally believed that mental cleanliness can cause the patient to form strangers to themselves and their acquaintances from time to time, affecting their interpersonal relationships.