You should do this if: you think you might have high blood pressure or might be at risk of having high blood pressure, or if you're aged 40 or over and have not had your blood pressure checked for more than five years.
Other things that increase a person's chances of developing hypertension include having close relatives with high blood pressure, being overweight, smoking, drinking too much alcohol, stress, and your ethnicity - as those with a Black African, Black Caribbean or South Asian background are at higher risk.
NHS guidance adds: "You should have a blood pressure test if you're worried about your blood pressure at any time.
High blood pressure can be caused by a number of factors, including getting older, being overweight, and eating an unhealthy diet - particularly one that is high in salt.
Also known as hypertension, high blood pressure is the most treatable risk factor of stroke, but it usually has no symptoms.
