Doctors have a name for that fuzzy feeling in your head when you leap to your feet from a sitting position: ‘’orthostatic hypotension.’’ When you stand up quickly, gravity causes blood to settle in the lower parts of your legs and lower torso. Your body tries to equalize blood pressure to your upper torso, arms, and head, which results in a sudden drop in blood pressure and a few seconds of feeling faint.
Many disorders can cause problems with blood pressure regulation and lead to dizziness when standing up. Categories of causes include
- Malfunction of the autonomic nervous system due to disorders or drugs
- Decreased ability of the heart to pump blood
- Decreased blood volume (hypovolemia)
- Faulty hormonal responses
Causes differ depending on whether symptoms are new or have been present for some time.
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