how do I know if my blood pressure is low or high

Hello. Thank you for posting.

You can find out by having your blood pressure taken by a medical professional. When your blood pressure is taken, it’s expressed as a measurement with two numbers, with one number on top (systolic) and one on the bottom (diastolic), like a fraction. For example, 120/80 mm Hg.  The top number refers to the amount of pressure in your arteries during the contraction of your heart muscle. This is called systolic pressure. The bottom number refers to your blood pressure when your heart muscle is between beats. This is called diastolic pressure. Both numbers are important in determining the state of your heart health. 

Helena