Hyperventilation affects the whole body, and as part of this, it agitates the nervous system. This can result in the following symptoms that are unlikely to encourage sound sleep:
Pins and needles in the hands, face and feet
A sense of being disoriented
An inability to think properly
Feeling lightheaded or dizzy
In addition to the nervous system being affected, nightmares are linked to hyperventilation, the heart may beat rapidly or irregularly, muscles can cramp, the stomach protests, urination may increase, and an underlying sense of impending doom, or that all is not right in the world is common.
It is likely that you are hyperventilating when you sleep if you often breathe through your mouth when you are sleeping, or if you wake up with a dry mouth or sore throat