Sleep apnea can start at any age, but it is most commonly seen in adults over the age of 40. It is also more common in men than women. Obstructive sleep apnea (OSA) occurs when the airway collapses or becomes blocked during sleep, causing pauses in breathing and a decrease in oxygen levels. This can lead to daytime fatigue, snoring, and other health problems if left untreated. Treatment options include lifestyle changes such as weight loss and avoiding alcohol before bedtime; using devices such as CPAP machines; or surgery for more severe cases.