Healthy blood pressure
Key facts When blood is pumped by the heart around the body, the pressure of the blood pushing against the walls of blood vessels changes. Your blood pressure changes throughout the day depending on many factors including your general health and activity levels. Blood pressure can be measured manually, with a blood pressure cuff and stethoscope, or with an automated blood pressure machine. High blood pressure can increase your risk of many health conditions, especially heart disease. Low blood pressure does not always cause problems, but if it does, you should speak to your doctor about ways to manage it.