High blood pressure, also known as hypertension, often doesn’t show any noticeable symptoms, but it can be very harmful to your health. The main risks include damage to your blood vessels and organs, which raises the likelihood of serious health issues. Fortunately, high blood pressure can usually be managed effectively with lifestyle changes and/or medication.
Blood pressure measures the force of blood against the walls of your blood vessels. It fluctuates during the day: when the heart pumps, the pressure is higher, known as 'systolic pressure.' When the heart relaxes, the pressure drops, which is referred to as 'diastolic pressure.'
Several factors can raise blood pressure. High blood pressure can be dangerous because it puts extra strain on your blood vessels, increasing the risk of heart problems and damage to organs.
When is blood pressure too high?
Blood pressure is measured in millimetres of mercury pressure (mmHg). Doctors adhere to the following guidelines:
Upper pressure:
- Up to 120 mmHg: ideal blood pressure
- 120-140 mmHg: normal blood pressure
- 140-180 mmHg: high blood pressure
- 180 mmHg or higher: severely high blood pressure
Lower pressure:
- 90 mmHg or lower: ideal blood pressure
- 90 to 110 mmHg: high blood pressure
- 110 mmHg or higher: severely high blood pressure
Blood pressure fluctuates throughout the day and sometimes even throughout the week. It is therefore advised to measure or have your blood pressure measured several times a day over the course of a few days. This will give a good overall picture of your average blood pressure.