Low blood pressure, also known as hypotension, is a condition where the arterial blood pressure is abnormally low. It 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, what is considered low blood pressure for one person might be normal for someone else. Low blood pressure might cause no noticeable symptoms, or it might cause dizziness, lightheadedness, nausea, fainting, fatigue, neck or back pain, headache, blurred vision, heart palpitations, or confusion. Sometimes, low blood pressure can be life-threatening.

The causes of low blood pressure range from dehydration to serious medical conditions. Some common causes include prolonged bed rest, pregnancy, certain medications, heart problems, endocrine disorders, and dehydration. Its important to find out whats causing low blood pressure so that it can be treated, if necessary. If you have consistently low blood pressure readings but feel fine, your healthcare provider may just monitor you during routine health checkups.

As a general guide, low blood pressure is a reading of 90/60 or less. However, it is not necessary for both your systolic and diastolic readings to be in this range for it to be considered low blood pressure. For example, a reading of 80/65 would be considered low because the systolic number is in the low range, and 100/55 would also be considered low because the diastolic number is in the low range[[2]](https://www.nhsinform.scot/illnesses-and-conditions/heart-and-blood-vessels/condit...