Obstruction of the nose and breathing during sleep.
D000328:Adult; D000402:Airway Obstruction / Q000503:physiopathology*; D006801:Humans; D007223:Infant; D009668:Nose Diseases / Q000503:physiopathology*; D012119:Respiration; D012890:Sleep; D012891:Sleep Apnea Syndromes / Q000209:etiology