Hypoglycemia
Hypoglycemic symptoms can also occur when one is sleeping. Examples of symptoms during sleep can include damp bed sheets or clothes from perspiration. Having nightmares or the act of crying out can be a sign of hypoglycemia. Once the individual is awake they may feel tired, irritable, or confused and these may be signs of hypoglycemia as well.
Neuroglycopenia
Perhaps a much more common example of the same phenomenon occurs in the people with poorly controlled type 1 diabetes who develop symptoms of hypoglycemia at levels of blood glucose which are normal for most people.