Below I list some obvious symptoms that require this test. 1.People who snore during sleep or with obvious disproportionate sleep breathing. 2. Those who are tired or dozing off during the day for unknown reasons. Let me give you two examples: Patient A, who came to the hospital because he was sleepy during the day with several consecutive accidents while driving. After polysomnography monitoring throughout the night, he was found to have severe sleep apnea. My advice to him is that it is better not to drive until the treatment is effective because it is easy to have traffic accidents. Patient B, who fell asleep halfway through the meal clip during the day when he was most sleepy, had a reduced blood sample saturation of less than 40% at night, and even developed incontinence, and his family was afraid to leave during the day and night for fear of danger. After finding the cause and treating it, the patient is now back to normal life. So why do these people have daytime dozing? Because of frequent snoring and sleep apnea at night, resulting in the brain in a state of “micro-awakening”, in layman’s terms, like a person sleeping when someone always pushes him awake, so sleep a night the next day is certainly not good; every day, the day is bound to appear sleepy. Of course, if you always stay up late to appear sleepy, is not used to do the examination, adjust the work and rest time can be. 3, children appear open-mouth breathing or thickening of breathing sounds during sleep; abnormal growth and development, except for those with other factors. Sleep apnea in children is different from that in adults, some of them show “small snoring”, some show open-mouth breathing or drooling during sleep, some show special positions during sleep (lying on their sides, tilting their heads, sleep restlessness, etc.). If these conditions occur occasionally or after an acute upper respiratory tract infection, you can observe them first. I have also seen a child who was seen for growth retardation and was significantly behind his peers in both height and weight. A PSG examination revealed that his sleep apnea index had reached the severe adult standard (the diagnostic criteria for children are lower than those for adults). Because many growth hormones are secreted at night, sleep structural disorders and frequent hypoxia will inevitably affect children’s development. 4. Those with significant cardiac arrhythmias at night. I have performed statistics on previous sleep monitoring data in the department and found that the more severe the sleep apnea patient, the more significant the heart rate variability at night. For example, if a person’s heart beats 70 times per minute during the day, if there is apnea during sleep, the heart rate will show roller coaster-like changes, with peaks of over 100 or even 120, and slow times as low as 40-50, which can also induce more serious arrhythmias. 5, refractory hypertensive people. Most hypertensive patients can control their blood pressure within the standard value by taking 1-2 kinds of drugs, but some patients take 3 or even more drugs, but their blood pressure is still unstable, high and low or not down to normal at all. If it is accompanied by snoring symptoms, it must also be checked. After regular treatment, patients can reduce the type of medication they take and their blood pressure can gradually return to normal. 6, diabetic blood sugar is not easily controlled or there is insulin resistance. Similar to point 5 and will not be repeated. 7, those with nocturnal attacks of asthma or gastroesophageal reflux. Sleep apnea patients, especially in the case of obstruction-oriented, upper airway obstruction leads to a significant increase in thoracoabdominal pressure, which brings another effect is gastroesophageal reflux, individual patients with nighttime episodes of asthma or choking cough is closely related to it. 8, unexplained morning headache or dry throat. Morning headache is often related to the lack of oxygen at night; dry throat is due to excessive evaporation of water from the mucous membrane of the pharynx caused by open-mouth breathing, and serious patients will appear in the morning sputum with blood. 9.Unexplained cardiopulmonary failure, except for other factors. 10.Other cases requiring medical advice.