Low blood pressure, also known as hypotension, is a condition where the arterial blood pressure is abnormally low. For most adults, a normal blood pressure is usually less than 120/80 mm Hg. Low blood pressure is generally considered a blood pressure reading lower than 90 millimeters of mercury (mm Hg) for the top number (systolic) or 60 mm Hg for the bottom number (diastolic) . However, whats considered low blood pressure for one person might be okay for someone else. Some people who have low blood pressure experience symptoms as a result of it, while others may not have any symptoms. If you have consistently low blood pressure readings but feel fine, your healthcare provider may just monitor you during routine health checkups. Its important to see a healthcare provider to get a correct diagnosis and find out whats causing low blood pressure so that it can be treated, if necessary.