When you have this condition, your breath can become very shallow or you may even stop breathing -- briefly -- while you sleep. It can happen many times a night in some people.
Obstructive sleep apnea happens when something partly or completely blocks your upper airway during shut-eye. That makes your diaphragm and chest muscles work harder to open the obstructed airway and pull air into the lungs. Breathing usually resumes with a loud gasp, snort, or body jerk. You may not sleep well, but you probably won't be aware that this is happening.
When her son was in preschool, Cynthia Chin-Lee remembers teachers saying he would fall asleep during playtime. Now, 10-year-old Joshua is impossible to rouse in the mornings, saying, "I need to sleep 10 more minutes. Leave me alone."
Joshua seems tired, he has bags under his eyes, and he's not doing well in school, explains Chin-Lee, 53, a manager at a software company in Palo Alto, Calif. Chin-Lee's husband had a theory: Maybe their son had sleep apnea, a condition with which her husband had recently...