Generally, low blood pressure or hypotension is a blood pressure reading of lower than 90 millimetres of mercury (mm Hg) for the systolic reading or a 60 mm Hg for the diastolic reading. Although you must know that what you consider low blood pressure for one person may be normal for someone else. Hypotension usually causes no noticeable symptoms. It is very important to seek medical attention when it does as low blood pressure can rarely even be life-threatening.
The symptoms experienced by a patient are usually unpleasant or disruptive. The common symptoms include feeling sick, lightheadedness or dizziness, blurred or distorted vision, confusion, difficulty in concentrating, feeling weak, nausea, fast or shallow breathing, agitation or unusual changes in behaviour or fainting or passing out.
You can also have postural hypotension if you get such symptoms when you stand up or change your posture suddenly.
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