I am sixteen years old and have a history of diabetes in the family. I wake up many mornings extremely early with a terrible feeling. It feels like my blood is boiling and running through my veins very hot. I also feel very nauseous but never actually vomit. The feeling lasts for about an hour than goes away. Some one on another website said this could be an early sign of diabetes. Did any one else notice this as an early sympotm? plaease help!