There are three types of sleep apnea: obstructive, central and mixed. The most common type is obstructive sleep apnea (OSA). OSA is a common and serious sleep disorder that causes you to stop breathing repeatedly during sleep. The airway continually becomes blocked and limits the amount of air that reaches your lungs. When this happens, you may snore loudly or make choking or gasping noises as you try to breathe. Eventually the brain alerts you to a lighter level of sleep and you reposition your jaw and tongue to open your airway. The process can occur over and over again throughout the night, leaving you feeling less rested than when you first went to sleep. More often than not, sleep apnea is misdiagnosed or missed completely. Symptoms can be easily confused with a separate heath problem, which is actually a component of the underlying sleep disorder.