Nasopharyngeal stenosis, a classic symptom of obstructive sleep apnea, is an increasingly common condition in which the upper airway repeatedly collapses during sleep, causing decreased oxygen saturation as well as sleep disruption. Its symptoms include snoring, apnea, and daytime sleepiness. The pathogenesis of obstructive sleep apnea varies, with susceptibility factors including narrow upper airway, unstable respiratory regulation, low arousal threshold, low lung volume, and dysfunction of the upper airway dilator muscles. Risk factors include obesity, masculinity, age, menopause, fluid retention, tonsillar hypertrophy, and smoking. Obstructive sleep apnea can cause daytime sleepiness, road traffic accidents, and may lead to hypertension. It may be associated with myocardial infarction, congestive heart failure, stroke, and diabetes, although not with great certainty. We can diagnose nasopharyngeal stenosis by its clinical manifestations. 1. Asymptomatic when calm, crying, and mild inspiratory difficulties when active. 2.Mild inspiratory dyspnea when quiet, aggravated by activity, but does not affect sleep and eating, and hypoxic symptoms are not obvious. 3.Inspiratory dyspnea is obvious during the inspiratory period, with a loud laryngeal sound and obvious depression of the external soft tissues such as the suprasternal fossa and supraclavicular fossa during the inspiratory period. Irritability, difficulty in sleeping and reluctance to eat due to hypoxia. The patient has an accelerated pulse, elevated blood pressure, and a strong and vigorous heartbeat, i.e., the compensatory function of the circulatory system is still good.