Have you ever stood up and felt a bit dizzy and lightheaded? Learn why it happens in this SciShow Quick Question!
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Tagged under: SciShow,science,Hank,Green,Blood Pressure,systolic,diastolic,hypertension,hypotension,faint,fainting,dizzy, stars, I feel lightheaded I stand ,lightheaded,head rush,orthostatic,postural hypotension,blood vessels,heart rate,Michael,Aranda
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