Common causes of hypotension and how to raise your blood pressure 13th Dec 2020 | Source: MSN You can raise low blood pressure by drinking water and eating more salt. Low blood pressure, or hypotension, is considered lower than 90/60 mm Hg. If another health condition is causing low blood pressure, you may need to take medication or wear compression stockings to raise it. A blood pressure reading lower than 90 mm Hg systolic (the top number) or 60 mm Hg diastolic (the bottom number) is generally considered low blood pressure, or hypotension. Here's what you need to know about...