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Postural hypotension or orthostatic hypotension is a type of low blood pressure that occurs when you stand after sitting or lying down. In other words, it is a sudden drop in blood pressure caused by a change in posture, such as when a person stands up quickly. You may experience dizziness or lightheadedness and possibly faint during such an episode. Other signs and symptoms include blurry vision, weakness, confusion, fainting or syncope.
In most of the cases, mild dehydration, low blood sugar or overheating can trigger such symptoms. It is not much of a concern if these symptoms occur occasionally. However, losing consciousness requires medical attention even if it happens for a few seconds.
Postural hypotension can be mild with brief episodes in many cases. However, long-lasting orthostatic hypotension can be indicative of some underlying more-serious health issues. Therefore, it is vital to consult a health care provider if a person frequently feels lightheaded when standing up after sitting or lying down.
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