Sleep apnea is a potentially dangerous disorder with fairly benign symptoms—loud snoring at night, and morning headaches or daytime bouts of sleepiness. The cause? Intermittent periods throughout sleep when an individual actually stops breathing. Breathing cessation, or apnea, lasts from seconds to nearly a minute. When breathing resumes—the brain senses lack of oxygen and wakes you up—snoring is loud, sometimes explosive. In the morning, the build-up of carbon dioxide in [...]