High pressure refers to systolic pressure, low pressure refers to diastolic pressure, systolic pressure 99mmHg, diastolic pressure 66mmHg is normal, it is recommended to continue to maintain good habits. Under normal circumstances, the human body in a quiet state when the systolic blood pressure is 90mmHg ~ 140mmHg, diastolic blood pressure is 60mmHg ~ 90mmHg, so the systolic blood pressure 99mmHg, diastolic blood pressure 66mmHg is normal, do not need to worry about it. However, generally blood pressure will fluctuate within the normal range due to exercise, emotions and other factors, and will not affect your health. People with normal blood pressure need to continue to maintain good habits, go to bed early and get up early, actively exercise, and reasonably combine meals to ensure a balanced intake of various nutrients. Besides, if the systolic blood pressure is lower than 90mmHg and diastolic blood pressure is lower than 60mmHg, it is considered to be low blood pressure. If the systolic blood pressure is ≥140mmHg, and/or the diastolic blood pressure is greater than or equal to 90mmHg, then it is considered to be high blood pressure. In daily life, people with normal blood pressure should also have their blood pressure checked regularly, and if their blood pressure is abnormal, they should go to the hospital in time.