Again, it may seem that these four concepts are not related. However, in my personal experience, I believe that there are indeed some connections between the four and are helpful in understanding certain psychiatric phenomena. The afterglow is derived from an ancient Chinese legend. During the Warring States period, a woman named Han E came to the state of Qi, and because she was hungry and had been without food for several days, she sang for food at the southwest gate of Linzi City in Qi. Her beautiful and melodious song deeply touched the heartstrings of the audience and left a deep impression on people. Three days later, people still heard the afterglow of her song lingering among the beams, and people said that Han E’s song “the afterglow lingers for three days”. In fact, the “lingering sound” here is a psychological phenomenon of epiphenomenal nature in psychology, i.e., the reproduction of auditory memory traces in the field of human consciousness. Similarly, it is not uncommon for other memory traces to be reproduced in the field of human consciousness, for example, the taste memory trace of “sour” will be reproduced when seeing green apricots, and even bring about the conditioned salivary gland secretion of “back teeth”. It is not uncommon to see auditory memory traces of the “three days of sound” in modern society, but no one has exaggerated it to that extent. For example, a famous singer’s fans from the crowded concert site after leaving, the mind from time to time echoes the tunes and songs of its favorite songs, there is a “lingering sound, endless” sense. Because this “afterglow” is people actively or voluntarily evoked memories, will not bring discomfort, not to mention the current emotional state, but also because it can be terminated at any time and will not have any interference with the subsequent conversion of mental activities, also does not have a “to pain ” nature. For the specific individual who produces this phenomenon, the reproduction of such auditory memory traces has the characteristic of “coming and going when called”, so he or she will not pay special attention to it. The concept of “cell phone ringing hallucination” is a concept I got from the Internet. It is also similar to the reproduction of auditory memory traces such as “ringing sound”. Some people often feel that their cell phones are ringing, but when they check their phones, they always find that there is no call, so they suspect that there is something wrong with their hearing. This phenomenon is most common in people who are accustomed to using cell phones to communicate and are currently worried or expecting some news to come, such as residents who have patients under their care in critical condition in the ward, or doctors on duty who have patients in critical condition in the ward, most of them have experienced this. Since the reproduction of such auditory memory traces is often accompanied by intense concern and corresponding anxiety or anxiety, they often have the subjective experience of “uninvited and lingering”, and even have a certain degree of mental suffering. Whether it is the aforementioned “come when called, leave when gone” or “come when not invited, leave when not gone” auditory memory traces reproduction, it does not have psychopathological significance, of course, it is not pathological, it should be considered a normal psychological phenomenon. It should be considered a normal psychological phenomenon. However, there is a certain degree of similarity with the above-mentioned phenomenon, and may cause the subjective suffering of the person concerned, a class of auditory memory trace reproduction has psychopathic significance, which is “forced echo”. Compulsive echoes are a common symptom in patients with certain psychiatric disorders, especially in children and adolescents with OCD, and can easily be confused with various forms of “hallucinations”, leading to misdiagnosis. Compulsive echolalia is an auditory representation that appears involuntarily in the “brain” of the patient, mostly as an auditory-like experience with ambiguous sounds and unclear semantics. Because children and adolescents do not yet have the experience of “echoes” in their lives, they are naturally anxious about such a strange experience and may be nervous to find the corresponding sound source or anxious to verify whether the experience is repeated. Under the influence of such emotions and reactions, the frequency of forced echoes increases significantly, so that some patients try to guess the information contained in these auditory-like experiences. If the patient is experiencing depressive episodes, such as depression or low self-esteem, he or she may guess that the “voice” is an accusation of “improper” character or behavior, until it is perceived as abusive language. In this way, the compulsive echoes evolve into “hallucinations”. If the patient repeatedly “verifies” that there is an external sound source, it becomes a “true” “verbal hallucination”. If the source cannot be identified, the patient’s compulsive echo-like experience becomes more typical, resulting in the perception of a number of voices “in the head”, which becomes what psychopathology defines as “pseudo-verbal hallucinations”. Patients who feel distressed, disgusted, or disgusted by the content of their “hallucinations” either “suppress” them by amplifying the volume of ambient sound sources such as home stereos playing music or cell phone headphones, or by plugging their earholes with cotton or paper balls in an attempt to block the “voices. This behavior is characteristic of compulsive behavior. Such behaviors are characteristic of compulsive behavior and may be effective in the early stages, but as the disease progresses, the patient’s efforts become meaningless. In a small sample study conducted in 2011, a number of patients with “true verbal hallucinations” recalled that during the initial phase of their hallucinations, they experienced “voices” in their “heads” rather than in their ears. Many patients with “true verbal hallucinations” recalled that during the initial phase of their hallucinations, they had experienced “voices” in the “head” rather than in the ear. Therefore, a careful understanding and identification of “hallucinations” is an important clinical ability to effectively reduce the misdiagnosis rate of mental disorders.