Firstly, what is blood pressure?
Your heart pumps blood around your body through blood vessels to help keep you alive. The pressure of the blood against the blood vessels changes. Your blood pressure is a measure of the highest pressure and the lowest pressure to give two figures (highest over lowest). Blood pressure is measured in millimetres of mercury (mmHg).
Low blood pressure
Also referred to as hypotension, low blood pressure means your blood is circulating with a lower force than normal It is generally better to have a lower blood pressure than a higher one.