It is difficult to generalize the exact value, which is directly related to the patient’s age, diet, and condition, but one certainty is certain: “The higher the blood pressure, the higher the risk of brain hemorrhage”. Why would I say that the higher the blood pressure, the more likely a brain hemorrhage will occur? The so-called blood pressure is the pressure, not the pressure. There is a lot of blood circulating in the blood vessels, and in this process, there is always a force exerted on the walls of the blood vessels, and the local pressure on the walls of the blood vessels is the blood pressure. The transit of blood is the heart, and the heart contraction burst out to the aorta of the blood impact is very large, which is the high pressure (systolic pressure), there is a saying called “things will be reversed”, when the heart contraction to the limit, it will begin to diastolic, the aorta will gradually become less pressure, which is then low pressure (diastolic pressure). Since we know that the blood will exert pressure on the blood vessel wall, then the following is better understood, the blood vessel wall of our brain is very fragile compared to other parts of the body, if the patient’s blood pressure is too high, then the burden on the blood vessel wall will also become high, higher than the limit they can withstand, they will rupture, brain hemorrhage and other diseases. So why is it that some patients with brain hemorrhage do not have particularly high blood pressure? Although high blood pressure is the most common cause of cerebral hemorrhage, it is one of the many causes, not the only one. High blood pressure causes brain hemorrhage because the blood vessel wall reaches its limit, then if the patient’s own blood vessels have lesions (vascular malformation, aneurysm, atherosclerosis), then even if the blood pressure is not high there may still be brain hemorrhage, just like we use two pockets of different quality to carry the same weight of items, although the weight of the items is the same, but the results of different quality pockets are completely different, the poor quality pocket is likely to be due to The bad quality pocket is likely to rupture because of the excessive weight, while the good quality pocket can withstand it and remain intact. Although we cannot be sure how much blood pressure will cause a brain hemorrhage, but as I said above, the higher the blood pressure the greater the risk, so as long as our blood pressure is higher than the standard value, it must be strictly controlled and treated in time, otherwise it will not only cause brain hemorrhage, but also heart and kidney problems may occur.