What is it used for?
A blood pressure measurement is most often used to diagnose high blood pressure.
Blood pressure that's too low, known as hypotension, is much less common. But you may get tested for low blood pressure if you have certain symptoms. Unlike high blood pressure, low blood pressure usually causes symptoms. These include:
Dizziness or lightheadedness
Nausea
Cold, sweaty skin
Pale skin
Fainting
Weakness
