When I was sleeping at noon, I dreamed that I was pinned down from behind by a person, and I couldn't even move if I wanted to. I fell asleep on my side, dreaming that I was negotiating with that person.
This is a nightmare, commonly known as a ghost. I used to do this in high school. Sometimes it is difficult to breathe, and my eyes can only be opened a little. I can clearly hear the dormitory people talking, but I can vaguely see them, but I just can't move. ...
Later, I specially checked it. It seems that it is caused by psychological pressure or something, not physical function damage, so don't worry too much.
More often, I will find that you breathe lightly but quickly, or your fingertips are hard. Do a few more tricks and then you can play slowly. You can try.
There is also the need to relax, relieve stress and go to bed early. I have nightmares most of the time. I sleep late.
Well, I hope it works for you ~