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Such dreams often appear repeatedly. The dreamer dreamed that he was in a familiar environment. Sometimes, the scenes in the dreams may not even feel like you have been in reality before, but they often appear in dreams.

Such dreams are often deformations of certain experiences that have left a deep impression on your subconscious mind in childhood memories. It may be some happy experiences in childhood, or it may be a sad experience, which depends on your emotions when you dream of this environment.

If it is the former, you feel physically and mentally happy and extremely relaxed in that environment in your dream, it is the body's recurrence of the pleasant experience and the body's self-relaxation. If it is the latter, it is a release of anxiety in the past. In either case, it is a beneficial self-regulation of the body.

After a person falls asleep, his response to some routine stimuli around him becomes abnormally slow. However, some weak stimuli that are not easily detectable during the day will be transformed into stronger signals at this time, transmitted to the cerebral cortex, and will be strengthened in certain active areas.

When dreaming such a dream, it is often during the day or when you are asleep. Signals formed by some subtle stimuli from the external environment are amplified in the dream, thus evoking a certain important memory buried in the subconscious.

In fact, in your consciousness, this memory may have been blurred or even forgotten. What appears in the dream is only the subconsciously processed and deformed form. Therefore, in the dream, you will feel that the environment, people and things you dreamed about are "similar to each other." I haven't been, but I feel familiar; I don't know, but I feel like I have seen it somewhere.