I always have a dream. In the dream, I am taking the elevator. The elevator is transparent and I am afraid. The elevator rises high for a while, and then comes down.

If this happens all the time, or often, it is necessary to have a physical examination. The key point is whether the blood pressure is high or not and whether there is any problem with the cervical vertebra.

Hypertension or cervical obstruction of blood flow and nerves may cause dizziness. "Dizziness" makes the brain associate, and you can find dizzy events from memory to "take the elevator", so you have a dream.