Sleep apnea is an ongoing disorder characterized by pauses in breathing that occur while sleeping. These disruptions can occur 30 times or more per hour. After the pauses, breathing will resume, sometimes accompanied by choking or snorting. Some symptoms include: daytime sleepiness (hypersomnia), loud snoring, headaches, sore throat, or dry mouth in the morning, insomnia, or abrupt awakenings in the night. There are two types of sleep apnea: obstructive and central. Obstructive sleep apnea is more common and is triggered by the airway collapsing or becoming blocked during sleep. Obstructive sleep apnea is most common in overweight people. Central sleep apnea occurs when the area of the brain that controls breathing fails to send signals to the breathing muscles. Central sleep apnea can affect anyone and can occur in addition to obstructive sleep apnea.