Orthostatic Hypotension: Why You Feel Dizzy When Standing. <br />Orthostatic hypotension (postural hypotension) is low blood pressure that happens when you stand up. It can cause dizziness, lightheadedness, or fainting. Here are what you need to know. <br /><br />References:<br />https://www.mayoclinic.org/diseases-conditions/orthostatic-hypotension/symptoms-causes/syc-20352548<br />
