If you can see it clearly, then this is another real place.
The big octopus is the image of something that appears in your dream. Because of its true feeling and great horror, I think it can only hurt you in your dreams, and it will not endanger your real life.
However, the touch of biting fingers should be reflected in reality.
An empty mountain, a place full of sand, is the place where those guys in your dream become octopus.
LZ pay attention to your physical condition, don't get sick, and then strengthen your will, and you will be relieved.