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 may be at risk of a deadly heart attack if you find unexplained lumps underneath the skin on your toes.
“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,” said the AAD.
“If you know what to look for, you can also find warning signs of heart disease on your skin and nails.
“Painful lumps in your fingers, toes, or both. What it may be telling you: You have an infection in your heart or blood vessels.
“If you have a heart infection known as infective endocarditis, these painful lumps can develop in your fingers, toes, or both places. The lumps can last for a few hours to several days.”
The lumps usually go away by themselves, but you’ll still need treatment for the infection.
Antibiotics can usually treat the infection, but surgery may also be necessary.
The infection could be a warning sign of coronary heart disease, which may subsequently lead to a heart attack.
Speak to a doctor if you develop painful lumps on your fingers or toes, added the AAD.
More 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.