Neurological diseases: cerebral infarction, cerebral hemorrhage, excessive sleepiness, dementia, seizures, etc.; mental abnormalities: anxiety, depression, confused language, strange behavior, personality changes, hallucinations, hallucinations, etc.; endocrine diseases: diabetes, obesity, growth retardation in children; sexual dysfunction: impotence, loss of libido, etc.; kidney damage: nocturia, proteinuria, etc.; digestive system diseases: gastroesophageal reflux; hematologic system diseases: gastroesophageal reflux; hematologic system diseases: nocturnal angina, nocturnal angina, myocardial infarction, etc. Blood system diseases: secondary erythrocytosis, increased blood viscosity; accidents: traffic accidents caused by sleepiness while driving; memory loss: reduced ability to live, study and work; others: a few serious patients will die suddenly at night, mostly from asphyxiation or from severe cardiac arrhythmia. If severe snoring plagues the body for a long time, it may also lead to sudden death in sleep. The survey and analysis of 460 sudden deaths found that 35% of cerebrovascular accidents such as stroke occurred during night sleep, and more than 53% of male cerebrovascular patients had a history of long-term habitual snoring. It proves that the occurrence of cerebrovascular accidents is closely related to snoring and apnea, and both sleep snoring as well as apnea can increase the morbidity and mortality of cerebrovascular disease. Therefore, sleep apnea is the culprit of cerebrovascular disease and the invisible killer that causes sudden death in sleep at night. Sleep apnea syndrome not only directly endangers the physical health of patients, but also causes a series of social problems and even endangers the lives of others. Car drivers with sleep apnea syndrome generally have reduced reflexes and judgment, and have difficulty concentrating. Accident statistics show that car drivers with sleep apnea syndrome drowsiness are three to seven times more likely to be involved in accidents than the normal population. In particular, the accident rate when driving alone is as high as 13 times higher. In addition to traffic accidents, the incidence of other operational accidents, such as tower cranes and flying, is also closely related to sleep apnea.