High blood pressure is a common condition that affects more than a quarter of all adults in the UK. But it's also really difficult to spot, as it rarely has any noticeable symptoms.
High blood pressure - which is also known as hypertension - puts extra stress on blood vessels and vital organs.
The condition could lead to some deadly complications, including strokes and heart attacks.
It's crucial that your hypertension is diagnosed as soon as possible.
While it may be difficult to know if you're at risk of high blood pressure, there are just a few tell-tale signs to look out for.
One of the most common symptoms of hypertension is having a pounding in your chest, according to the Texas Heart Institute.
Some patients may find that this pounding spreads to the head, and may feel like a really bad headache.
High blood pressure could also lead to a feeling of persistent dizziness.
But you can still go years without developing any noticeable signs of hypertension, it warned.
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"Most people who have high blood pressure do not have symptoms," said the institute.
"In some cases, people with high blood pressure may have a pounding feeling in their head or chest, a feeling of lightheadedness or dizziness, or other signs.
"A visit to your doctor is the only way to find out if you have high blood pressure.
"You should have a general medical check-up that includes a review of your family's medical history."
But just because you develop chest pain or dizziness, it doesn't necessarily mean that you have high blood pressure.
Chest pain may also be caused by something less serious, including heartburn or indigestion.
Dizziness, meanwhile, may simply be a sign that you've stood up too fast, or a problem inside your ear.
You should still speak to a doctor if your dizziness or chest pain won't go away, however.
You could lower your risk of high blood pressure by eating a healthy, balanced diet, and by doing regular exercise.
High blood pressure is often known as ‘the silent killer', because symptoms only tend to reveal themselves if you have extremely high blood pressure.
It's crucial that all adults over the age of 40 check their blood pressure at least once every five years.
You can check your blood pressure by visiting your local doctors' surgery or pharmacy.