Blood pressure 90- 140 is hypertension?

If high pressure is 140mmhg, low pressure is 90mmhg does not belong to the category of hypertension, but if it exceeds 140/90mmhg, it belongs to high blood pressure, transient high blood pressure, can not be diagnosed as hypertension, if the blood pressure in three clinics is higher than 140/90mmhg, it can be diagnosed as hypertension. Blood pressure is at a critical value for a long time, which is a precursor to hypertension. Attention should be paid to adjusting living habits in time.