If there is a sudden low blood pressure, get a sphygmomanometer to measure the blood pressure first. The normal human blood pressure is 90-139 mmHg systolic and 60-89 mmHg diastolic, if there is a blood pressure below this minimum is hypotension. Once hypotension occurs, first of all, do not exercise, keep the surrounding environment quiet, you can take brown sugar water and other supplemental volume. In addition, you need to go to the hospital for routine examination as well as treatment. In terms of treatment, the main focus is on the application of antihypertensive and antihypertensive drugs, such as ephedrine, dopamine, etc.; it is also necessary to strengthen nutrition and physical fitness to bring blood pressure back to normal.