Obstructive sleep apnea refers to a disorder where airflow is limited or stopped while a person sleeps.
When we sleep, all of the muscles in the body relax. As the muscles surrounding the throat relax, this can lead to a narrowing or collapse of the airway. When this occurs, the amount of air reaching the lungs is reduced. The brain and body may become oxygen deprived, causing a person to wake up or have disrupted sleep.
Common symptoms of sleep apnea include snoring, pauses in breathing, fatigue and sleepiness during the daytime. Other possible symptoms include: morning headaches, waking up with a dry mouth, waking up gasping for air, memory problems, difficulty staying asleep, and waking frequently to urinate.
Risk factors for sleep apnea include excess weight, older age, male gender, large neck size, a smaller airway or mouth, and having family members with a history of sleep apnea. Certain medications or alcohol use can also lead to or worsen sleep apnea, by causing the muscles in the neck to relax too much during sleep. Enlarged tonsils are the most common cause of sleep apnea in children, but are a much less common cause in adults.