Dream is not only a normal physiological phenomenon of human beings, but also an image language. These images range from ordinary things to surreal things; In fact, dreams often inspire artistic and other inspirations. The forms of dreams include unpleasant nightmares and spring dreams that may accompany wet dream. Most scientists believe that all human beings dream and sleep at the same frequency every time. Therefore, if a person feels that he has never dreamed or only had one dream in one night, it is because his memory of those dreams has disappeared. This kind of "memory erasure" usually occurs when a person naturally and gently enters the slow-wave sleep stage from the rapid eye movement sleep stage and enters the awake state. If a person is awakened directly from REM sleep (for example, by an alarm clock), they are more likely to remember the dreams they had during REM sleep (but not all the dreams that happened during REM sleep will be remembered, because a slow-wave sleep period will be inserted between each active sleep, which will lead to the memory of the previous dream disappearing).
Some dreams will predict something to some extent. If you believe it, it will. If you don't believe it, it won't.