Obstructive sleep apnea (OSA) is often a disorder a result of the repetitive collapse with the upper airway while sleeping. It is the most commonTrusted Source sleep-related breathing disorder.

OSA happens when the muscles supporting the soft tissues inside your throat, for example your tongue and soft palate, relax. This causes your airway to narrow and even close, momentarily cutting off your breathing.

Normally, air should flow smoothly in the mouth and nose into your lungs continually, including whilst sleeping.