Understanding High Blood Pressure
Key Information
High blood pressure usually has no symptoms, which is why the only reliable way to know if you have it is to get it checked.
When checking at home, a blood pressure that is consistently over 135 for the top number or over 85 for the lower number is considered too high.
Consistently high blood pressure puts extra strain on your heart and blood vessels, which can increase your risk of serious health problems like heart attacks and strokes.
If you are over 40 or haven't had your blood pressure checked in the last five years, it's important to get it checked.
What Happens Next?
The most important first step is to know your blood pressure numbers.
You can get your blood pressure checked here. If you are over 40, you can also get it checked for free at many local pharmacies.
If your home blood pressure readings show the top number is consistently over 135 or the lower number is over 85, please let us know through the link below.
When to Contact Us
High blood pressure usually has no symptoms. In rare cases, very high pressure might cause symptoms like headaches or blurred vision. If you experience these, you should seek medical advice.
As high blood pressure increases the risk of heart attacks and strokes, you should call 999 immediately if you believe you are experiencing symptoms of these conditions.
Further Information
For more detailed information about high blood pressure, we recommend visiting the British Heart Foundation website.
Last reviewed: 28 April 2026
Next review due: 28 April 2029
Page created: 28 April 2026