If the systolic blood pressure is 170 mmHg, there is no need to be afraid. The first thing to do is to rest quietly and retest the blood pressure after half an hour. If the blood pressure is still so high, actively look for causes and triggers that affect the blood pressure, and remove these causes and triggers to bring down the blood pressure naturally. If the cause cannot be found and the blood pressure is still repeatedly high, you should promptly consult a cardiology clinic to seek the help of a specialist and do the necessary tests, such as ambulatory electrocardiogram, ambulatory blood pressure, and cardiac ultrasound, to clarify. If the cause of the elevated blood pressure can be corrected, the blood pressure will also come down. If the cause cannot be found, it is a problem with the antihypertensive drug regimen, and a reasonable adjustment of the antihypertensive regimen can be made, and the blood pressure can be lowered to the standard range.