Lama Ole’s answer:
It is a bad sign for development because, in the dream phase, the energy is in the central channel—the energy axis through the body—and mostly at the throat or heart levels. Energy sinking in the body is often experienced as tightness, whereas if the energy moves upwards, one becomes clear.
Such a feeling of narrowness is a sign of energy movements that sometimes arise. One then can reverse this by saying, “I am a great bodhisattva and am going down to help beings.” This thought reverses it and makes it completely great.