This week’s freezing temperatures could cause high blood pressure, Dr Hilary Jones said on Lorraine, this morning.
Doctors have issued health warnings over the cold weather, and heart attacks are more common in snowy conditions.
Blood becomes thicker in cold conditions, which increases the blood pressure, Dr Hilary said.
The public must take care and look after themselves during the cold weather, he added.
“There are health hazards at the moment,” said Dr Hilary.
“Heart attacks are more common in cold weather. You see more people shovelling snow from their driveways.
“The blood becomes thicker, blood pressure becomes higher.”
“People with asthma, when they exercise in cold air, it can trigger an attack.
“They need to be very careful about wrapping up warm and putting a scarf over their mouth to warm the air.”
The cold weather can trigger certain health conditions, according to the NHS.
Colds, sore throats and norovirus are all more common during freezing temperatures.
The best way to prevent heart attacks in cold weather is to stay warm in your home.
Heat the main rooms you sue to at least 18 degrees Celsius, and use a hot water bottle or electric blanket to keep warm in bed, the NHS added.
High blood pressure affects more than 25 per cent of all UK adults.
The condition increases the risk of cardiovascular disease and strokes.
The only way to find out if your blood pressure is too high is to have it checked.
All adults should have their blood pressure checked at least every five years.