Here I would like to explain why obese people have sleep apnea at night. Obstructive sleep apnea syndrome is a common disorder in adults, with a prevalence of 4% in middle-aged men and 2% in women, and obesity is the most common causative factor. Unfortunately, more than 80% of patients do not realize that it is a disease. There are two main reasons why obesity can cause OSAS: first, the accumulation of adipose tissue in the pharynx can narrow the pharyngeal cavity in obese individuals. The accumulation of fatty tissue in the pharynx is mainly in the lateral wall of the pharynx, which reduces the opening of the pharynx during breathing. At the same time, these loose adipose tissues are more likely to produce collapse of the soft oropharyngeal wall between the soft palate and the epiglottis under negative pressure during inspiration, which aggravates airway obstruction. In addition, the thicker adipose tissue in the neck and lower collar of obese patients increases the extraluminal pressure in the oropharynx and laryngopharynx, resulting in the appearance of upper airway compression. Thus, the pressure in the pharyngeal airway of obese patients is another important reason for the easy collapse of the pharynx during inspiration. During the daytime, the compensatory contraction of pharyngeal muscles keeps the airway open during waking hours, so there are generally no symptoms. When the airflow passes through the narrow part, it generates vortex and causes vibration, thus snoring occurs, and in serious cases, breathing can be temporarily stopped. There is a closer correlation between the increase in neck circumference and the incidence and severity of OSAS than in generalized obesity. Patients with obstructive sleep apnea syndrome often experience inspiratory effort, cessation of respiratory flow, snoring and decreased oxygen saturation during sleep. As a result, frequent awakenings interfere with normal sleep, leading to daytime sleepiness and altered respiratory function. Repeated awakenings can significantly affect the quality of sleep and cause a series of pathophysiological changes, such as daytime sleepiness, fatigue, headache, sweating, nocturnal enuresis, as well as cognitive and intellectual decline and personality abnormalities. The decrease in oxygen saturation during apnea can lead to a number of arrhythmias, including sinus bradycardia, sinus arrest, atrioventricular block, and ventricular arrhythmias, increasing the risk of angina pectoris and infarction at night. In addition, the hypoxemia and hypercapnia caused by repeated apnea increase the sympathetic tone of patients, making them more likely to develop pulmonary hypertension and hypertension, which can lead to ventricular hypertrophy and cardiac dysfunction in severe cases. So see here, many obese patients may understand why they always snore at night, why no matter how long they sleep or sleepy …… If you have the above symptoms, it happens that you are obese, then I remind you that it is time to lose weight!