Hypotension is the medical term for blood pressure that is lower than what is considered normal. High blood pressure, also known as hypertension, is the opposite.
Blood pressure, or BP, is how hard the blood is pushing against the walls of the blood vessels. The heart sends blood to every part of the body.
Two different numbers are used to measure blood pressure. The top number, or systolic pressure, is the first number. This is how much pressure there is when the heart beats.
Diastolic pressure is the second number or the bottom number. It's the pressure that builds up between heartbeats. Most of the time, diastolic pressure is lower than systolic pressure.
Blood pressure that is healthy is usually around 120/80 mm Hg. But it's normal for the numbers to change a little bit throughout the day, no matter how healthy you are overall.
The National Heart, Lung, and Blood Institute says that your blood pressure is hypotensive if it is less than 90/60 mm Hg.
Your blood pressure changes naturally throughout the day to make sure that every part of your body, including your brain, heart, and lungs, gets enough blood and oxygen.
Your blood pressure is always being changed and balanced by your body. Your blood pressure may be affected by how you stand or sit.
So, low blood pressure might not be a cause for worry or cause any other symptoms that are scary.