The clock reads 3 a.m., and you abruptly open them. You find yourself suddenly fully awake.
No matter what time of night it is, you always seem to awake at the same time.
You may be thinking "What gives?" if this describes your situation.
Nighttime wakings are rather frequent and often not cause for alarm.
They may be a symptom of a more severe sleep disturbance or health problem.
Professor of pulmonary, critical care, and sleep medicine at the University of Washington Vishesh K. Kapur, MD, MPH.