Your dreaming state can be regarded as what people often say, "the ghost is pressing the bed", but it is not really the ghost pressing you, but the signal sent by the body, caused by sleeping posture, or the short-haired nerve feeling inside, fever or cold, which may all lead to it.
In addition, ghosts in dreams are usually the embodiment of depressed emotions, and whether they are powerlessness, anxiety or fear, they should be released in time.