Obstructive sleep apnea is a potentially serious sleep disorder in which breathing repeatedly stops and starts during sleep. Obstructive sleep apnea occurs when your throat muscles intermittently relax and block your airway during sleep. The most noticeable sign of obstructive sleep apnea is snoring. Signs and symptoms of obstructive sleep apnea include: excessive daytime sleepiness; loud snoring; observed episodes of breathing cessation during sleep; abrupt awakenings accompanied by shortness of breath; awakening with a dry mouth or sore throat; awakening with chest pain; morning headache; difficulty concentrating during the day; experiencing mood changes, such as depression or irritability; difficulty staying asleep; having high blood pressure.
Obstructive Sleep Apnea, Mayo Clinic (Mar. 6, 2018), https://www.mayoclinic.org/diseases-conditions/obstructive-sleep-apnea/symptoms-causes/syc-20352090