A high pressure of 90mmHg and a low pressure of 60mmHg is normal blood pressure and is generally not serious. If your blood pressure is usually high and suddenly drops a lot with related symptoms, you need to pay attention to it. Adults quiet state normal blood pressure range for systolic blood pressure 90 ~ 120mmHg, diastolic blood pressure 60 ~ 80mmHg, so high pressure 90mmHg, low pressure 60mmHg belongs to the normal range of blood pressure, if there is no obvious discomfort, it is generally not serious. If the usual state of hypertension, a short period of time will suddenly drop the blood pressure to the value, and accompanied by dizziness, fatigue, panic, etc., you need to pay attention to, may be caused by overdose of antihypertensive drugs. If not corrected in time, the blood pressure may get lower and lower, causing insufficient blood supply to the vital organs of the body. In summary, if there is no history of hypertension, it is normal. If there is a history of hypertension and the blood pressure suddenly decreases with symptoms, it is necessary to seek medical attention and follow the doctor’s instructions.