High pressure is usually systolic and is usually not less than 90 mmHg in a normal person.
When the human heart contracts to pump blood, the pressure within the aorta rises to a certain extent, and when the pressure in the arteries reaches its highest value, the pressure exerted on the inner wall of the blood vessel is the systolic blood pressure that is usually measured. The normal range of systolic blood pressure is between 90 and 139 mmHg, so that systolic blood pressure should not normally fall below 90 mmHg.
A mild decrease in systolic blood pressure, if not accompanied by clinical symptoms, is usually physiologic and does not require special treatment. However, if there is a sudden and drastic decrease, it may indicate a pathologic manifestation such as shock, which may lead to insufficient blood perfusion to the whole body, and even threaten the life of serious cases.
Blood pressure is an important indicator of human health, so you should pay attention to monitoring it in your life, and seek medical attention and treatment when you find any abnormality.