Blood pressure of 90/60mmHg is within the normal range, but it is a critical value, and low blood pressure can be prevented by improving lifestyle habits. Currently, our country stipulates that the normal adult systolic blood pressure should be 90~139mmHg and diastolic blood pressure should be 60~89mmHg. If there is systolic blood pressure >140mmHg and/or diastolic blood pressure >90mmHg, it is considered as hypertension, and if there is systolic blood pressure <90mmHg and/or diastolic blood pressure <60mmHg, it is considered as low blood pressure. Low blood pressure can be caused by diseases such as heart failure and hypothyroidism. A blood pressure of 90/60mmHg is the threshold of the normal blood pressure range. In this case, you should pay more attention to your lifestyle, enhance your nutritional intake, and eat more protein-rich foods to avoid low blood pressure. In case of low blood pressure, it is necessary to go to the hospital in time and take treatment according to the doctor's advice to avoid delaying the condition.