Heart attacks are caused by a lack of blood reaching the heart.
Without enough blood, the heart could become seriously damaged – and it may even be life-threatening.
A heart attack could also be a symptom of coronary heart disease, which is where fatty deposits build up in the arteries, which limits the amount of blood reaching the heart.
You could be at risk of a heart attack if you develop blue or purple patches on your skin.
“Warning signs can appear on your skin and nails, which is why your dermatologist may be the first doctor to notice that you have heart disease,” it said.
“If you know what to look for, you can also find warning signs of heart disease on your skin and nails.
“When you’re extremely cold, your skin can turn blue [or purple].
“If an area of your skin is blue [or purple] when you’re warm, that’s can be a sign your blood isn’t getting enough oxygen.”
Meanwhile, you could also be at risk of a heart attack if you start passing fewer stools than normal.
Having fewer toilet trips than normal may be caused by constipation.
Constipation is usually accompanied by harder, firmer stools, which usually causes an element of straining when using the toilet.
Straining increases the risk of high blood pressure, which may subsequently lead to a heart attack.
The most common heart attack symptoms include severe chest pain, having a radiating pain in your arm, and suddenly feeling very dizzy.
But you can lower your risk of a heart attack by making some small diet or lifestyle changes.
Eating a healthy, balanced diet will lower your chances of fatty deposits in your arteries.
If you think you, or someone you know, may be having a heart attack, it’s crucial that you dial 999 straight away.