Sleep apnea syndrome is a common complication in patients with obesity, referring to sleep with breathing intervals of more than 10 seconds, alternating snoring and apnea, sometimes the duration of apnea can reach the ability to judge, memory loss, easy fatigue, difficulty in deep sleep at night, frequent napping during the day, and finally developing into hypertension, pulmonary hypertension, heart failure, hypoxemia and high carbon for 2 to 3 minutes, with episodes every night several times. In the long term, this leads to decreased sleep quality, brain hypoxia, and patient acidemia. Some data show that those who have more than 20 pauses per night can have a 10-year mortality rate of more than 30%. The main reason for the occurrence of this complication is excessive accumulation of fat in the neck, flabby airway and backward tongue root, which leads to snoring and apnea. Moreover, obese patients gain weight, lung wall compliance decreases, lung ventilation is inadequate, and finally hypercapnia and hypoxemia occur. In obese patients with hypertension, the condition can be further aggravated, leading to pulmonary hypertension and heart failure. How is it treated? For this complication, gastric reduction surgery is currently a good option. Aggressive weight loss treatment is the basic measure for apnea syndrome, while alcohol consumption and sedation should be avoided. A 10% weight loss can increase oxygen saturation by 5% and symptoms can be significantly improved. The effect of gastric reduction surgery on this condition is very impressive, not only allowing the patient to lose a significant amount of weight, but also controlling the further development of the condition. Reducing the number of apneas can significantly reduce mortality. If you are already suffering from more severe sleep apnea syndrome, it is important to take measures and not to miss the best time for treatment.