Some treatments involve lifestyle changes, such as avoiding alcohol or muscle relaxants, losing weight, and quitting smoking. Many people benefit from sleeping at a 30-degree elevation of the upper body or higher, as if in a recliner. Doing so helps prevent the gravitational collapse of the airway. Lateral positions (sleeping on a side), as opposed to supine positions (sleeping on the back), are also recommended as a treatment for sleep apnea, largely because the gravitational component is smaller in the lateral position. Some people benefit from various kinds of oral appliances such as the Mandibular advancement splint to keep the airway open during sleep. Continuous positive airway pressure (CPAP) is the most effective treatment for severe obstructive sleep apnea, but oral appliances are considered a first-line approach equal to CPAP for mild to moderate sleep apnea, according to the AASM parameters of care. There are also surgical procedures to remove and tighten tissue and widen the airway.
Sleep apnea , also spelled sleep apnoea , is a sleep disorder characterized by pauses in breathing or periods of shallow breathing during sleep .  Each pause can last for a few seconds to a few minutes and they happen many times a night.  In the most common form, this follows loud snoring .  There may be a choking or snorting sound as breathing resumes.  As the disorder disrupts normal sleep, those affected may experience sleepiness or feel tired during the day.  In children it may cause problems in school, or hyperactivity.