This type of dream usually reflects memories inspired by childhood impressions. This memory is different from other memories, and it is a kind of memory hidden in the subconscious. This kind of memory may not be recalled when you are awake, but it often appears repeatedly in your dreams. For example, children of day students are often worried about being late. Adults often have dreams they can't catch up with. So dreams like this also belong to the embodiment of the subconscious.