When observing blood pressure, you should try to do four things, the specific four things are fixed time, fixed site, fixed position, fixed sphygmomanometer. Fixed time is three consecutive days at the same time for measurement, such as every day around 10:00 a.m. to detect blood pressure, fixed site is a continuous measurement of the same arm, fixed position is the same position, for example, the best three consecutive days in the lying position is the lying position, if it is a standing position is the standing position to detect, fixed sphygmomanometer refers to the use of the same sphygmomanometer, so as not to have a greater error. In the absence of a diagnosis of hypertension, it is necessary to test at least three consecutive days, if the test blood pressure are higher than normal, can be diagnosed as hypertension, you can also perform dynamic blood pressure testing. Blood pressure is the lateral pressure on the walls of the blood vessels. Increased blood pressure can cause headaches, dizziness, insomnia and other neurological symptoms.