The NHS states that high blood pressure is considered to be 140/90 millimetres of mercury (mmHg) or higher (or 150/90mmHg or higher if you’re over the age of 80).
Whereas ideal blood pressure is usually considered to be between 90/60mmHg and 120/80mmHg.
“If your blood pressure is too high, it puts extra strain on your blood vessels, heart and other organs, such as the brain, kidneys and eyes,” the service says.
“Persistent high blood pressure can increase your risk of a number of serious and potentially life-threatening health conditions, such as heart disease, heart attacks, strokes, heart failure, peripheral arterial disease, aortic aneurysms, kidney disease and vascular dementia.”