Undiagnosed high blood pressure, also known as hypertension, affects an estimated 5.5 million in the UK, according to the British Heart Foundation.
Many factors can increase the risk of having consistently high blood pressure – from eating too much salt to being overweight. But it has also been found that the amount of sleep you get can play a big part.
Having high blood pressure is considered when a person’s reading measure 140/90mmHg (or an average of 135/85mmHg at home) – or 150/90mmHg (or an average of 145/85mmHg at home) if you're over the age of 80.