High blood pressure is a common condition that affects more than a quarter of all adults in the UK. The condition, which is also known as hypertension, puts extra stress on blood vessels and vital organs.
Hypertension increases the risk of developing some deadly complications, including heart attacks and strokes.
It's crucial that you make a few lifestyle changes to lower your blood pressure, if you have hypertension.
But, it can be difficult to know if you're at risk of high blood pressure, as the condition rarely has any visible symptoms.
There are some warning signs that you should be looking out for, though.
You may be at risk of high blood pressure if you find it difficult to speak normally, or if you struggle to understand speech, according to medical website LiveStrong.
Hypertension may also be causing a numb feeling on the side of your face, or even a tingling in your fingers, it added.
If you have any of these symptoms, you should speak to a doctor straight away.
They may be caused by a hypertensive emergency, which is where blood pressure rises extremely high.
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"Called the ‘silent killer', hypertension rarely produces overt symptoms and can be deadly if left uncontrolled," said the medical website.
"When not controlled blood pressure levels can rise to the point that you start to experience physical symptoms.
"Some of the symptoms are nonspecific and may be overlooked as being a byproduct of some less serious condition or an external cause.
"These symptoms can worsen acutely and in some cases result in sudden death.
"You should seek immediate assistance from a health care professional if you're experiencing trouble speaking or understanding speech, numbness or tingling in your hands and feet, weakness or numbness of your face or one side of the body or a severe headache from an unknown cause."
Other warning signs of a hypertensive emergency include muscle tremors, or if you have a sudden fall.
If you've already been diagnosed with high blood pressure, and develop any of these symptoms, you should speak to a doctor straight away.
Any blood pressure above 180/120mmHg could permanently damage your blood vessels, and they may subsequently start leaking fluid.
A number of people in the UK may have high blood pressure without even knowing it.
That's because signs of the condition only tend to reveal themselves if you have extremely high blood pressure.
But, it's crucial that people with hypertension identify the condition early, as it can lead to a number of deadly complications.
All adults over 40 years old should check their blood pressure at least once every five years.