If you live in a high-rise building and the water pressure is too low, the tap water will not go up. If the blood pressure is too low, there will be no blood in the surrounding small blood vessels and brain. For example, if your heart has no strength, or if there is less blood for various reasons, your brain will be ischemic, and your brain will not be able to make your heart beat strongly, so your blood vessels will contract and your blood pressure will rise through your cranial nerves. At this time, although the heart problem has not been solved, your brain will not become dementia for the time being.

In other words, sugar is energy, the heart is weak, and the brain lacks nutrition. The human body thinks that the heart is short of sugar, or the brain is getting less and less nutritious, so let the blood sugar rise to supplement the energy of the heart and brain. However, there are many reasons why this heart is weak. This reflection of the human body is actually unreasonable, so it becomes hyperglycemia. But the brain can have enough energy with less blood, but this amount of sugar is unreasonable for other organs.

This is just a heartfelt guess. When other organs have problems, the same problem will also occur. That's all the human body can do, either blood sugar or blood pressure. It can do nothing else. So from this point of view, simply lowering blood pressure and blood sugar did not solve the fundamental problem, but relatively speaking, it did solve the problem of hyperglycemia and hypertension faced by most organs.