Social development and progress brought about by the results, not only improve the people’s living standards, improve people’s living environment, but also can not be denied, there is also environmental degradation, increase the pressure of survival of people nowadays and so on the influence of many favorable factors. In the long run, it leads to some people can not bear, and the emergence of some chronic diseases, which is represented by high blood pressure, high blood pressure in the population in the growing, which is extremely unfavorable side of the development of society. There are some people say that early morning hypertension is very dangerous, is this true? First of all, we need to have some necessary understanding of the various peak time periods of blood pressure. Normal people’s blood pressure fluctuates between 20-30 mmHg throughout the day. Older people fluctuate more than younger people. Under the influence of sleep, a person’s blood pressure has 2 peaks and 2 valleys in a day: the first peak is at 6-8 am in the morning; it starts to fall after 8 am, and is the first valley at l2 pm to 2 pm at noon; then the blood pressure starts to rise, and is the second peak at 5-8 pm; after that, the blood pressure falls and is the lowest point of the whole day at 1 am Then it starts to rise and reaches a second peak at 5-8 p.m. Thereafter, it falls to 1 a.m. and reaches a second peak at 1 a.m. -2 a.m., which is the lowest point of the whole day, i.e., the second trough, and then it gradually rises. It can be seen that the time period with the greatest degree of change in blood pressure is the early morning, and early morning hypertension is the primary risk factor for the high incidence of cardiovascular and cerebrovascular events. Epidemiologic surveys show that about 40% of myocardial infarctions and 29% of sudden cardiac deaths occur in the early morning hours. Early morning hypertension is also the strongest independent risk factor for stroke, with the incidence of stroke at this time of day three to four times higher than at other times of day. There is also a fivefold increase in the relative risk of carotid atherosclerosis in patients with early morning hypertension. It may also exacerbate renal impairment in patients with chronic kidney disease. Therefore, it is imperative to recognize and manage early morning hypertension. According to this situation, if you want to take to take antihypertensive medication is best before the arrival of the morning peak of blood pressure, that is, as soon as you get up; or in the afternoon before the arrival of the peak of blood pressure 1-2 hours, that is, 4-5 o’clock in the afternoon and then take the medication, you can make the blood pressure to keep stable. Therefore, it is said that early morning is hypertension, the most dangerous time period, this is indeed true, people with high blood pressure must avoid this problem, early morning pressure control, must do a good job in order to reduce the risk.