A large number of epidemiologic investigations have shown that the prevalence of hypertension in patients with snoring and sleep apnea can be up to 50% or more, which is much higher than that of the population, which is 11~12%. And this prevalence is related to the severity of sleep apnea, i.e., the more severe the sleep apnea, and the more obvious the trend of hypertension. Conversely, the prevalence of sleep apnea is also significantly higher in the hypertensive population and can reach 30-40%. This high frequency of co-morbidity is particularly evident in adults under 50 years of age. Secondly, synchronized sleep apnea monitoring and continuous blood pressure monitoring revealed that sleep apnea can cause an increase in blood pressure at night, with an average of 25% increase in blood pressure at the end of apnea and after waking up in patients with sleep apnea, and that the increase in blood pressure is closely related to the severity of sleep apnea. The increase in blood pressure occurs not only at night, but also after waking up and during the daytime.SAS not only affects the absolute level of blood pressure, but also changes the 24-hour blood pressure rhythm. SAS not only affects the absolute level of blood pressure, but also changes the 24-hour blood pressure rhythm, which is characterized by a 24-hour “non aryepiglottic” change in blood pressure, with an increase rather than a decrease in blood pressure during the night. Another characteristic different from other hypertensive patients is that most of their blood pressure is highest in the morning, headache and dizziness are obvious in the early morning, and the effect of drug treatment alone is poor. More direct evidence that sleep apnea triggers hypertension is that after complete or significant relief from sleep apnea is achieved with treatment, hypertension is also significantly reduced or even normalized. In conclusion, sleep apnea is a risk factor for hypertension independent of factors such as obesity and age, and is an important cause of secondary hypertension. If you have morning hypertension, poorly controlled hypertension, fluctuating blood pressure, or “non-paleo” changes in blood pressure at night, ask your family if you snore when you sleep to determine if you should visit a sleep center to rule out the possibility of sleep apnea.