1, simple systolic hypertension is common: 60%, because the elderly aortic sclerosis near inelastic pipeline. 2, blood pressure fluctuations, the elderly pressure receptor sensitivity is reduced, the response becomes slower, is a reduction in heart rate variability, blood pressure variability; elderly patients postprandial hypotension, especially after breakfast consumption of carbohydrates is obvious, and diurnal blood pressure fluctuations, seasonal obvious, so the elderly should pay more attention to multiple measurements of blood pressure and careful adjustment of the treatment plan. 3, prone to postural hypotension, that is, a 20 mmHg drop in systole or a 10% or more decrease in mean arterial pressure in the standing position compared to the lying position, the causes of which are related to atherosclerosis, sinus atrial dysfunction, autonomic dysfunction, insufficient blood volume, and reduced responsiveness of the RAAS system. 4, prone to heart failure. 5, mostly asymptomatic hypertension, the end target organ damage and complications are common, and mostly asymptomatic, resulting in family members easily ignored. 6.More combined with chronic diseases. 7, individual differences in response to treatment, increased difficulty in lowering blood pressure. 8, there is also the occurrence of hypertension characterized by low renin type, arm arteriosclerosis serious X-ray found to have vascular calcification shadow, but also to exclude pseudo-hypertension.