This is a common sleep disorder that can make it hard to fall asleep, hard to stay asleep, or cause you to wake up too early and not be able to get back to sleep. You may still feel tired when you wake up. It can sap not only your energy level and mood but also your health, work performance and quality of life.

This is an explosive expiratory maneuver that is reflexively or deliberately intended to clear the airways. It is one of the most common symptoms prompting physician visits. Likely causes differ depending on whether the symptom is acute (present < 3 wk) or chronic.