The symptoms of heart failure can vary from person to person. They may start suddenly or develop gradually over weeks or months.
The most common symptoms of heart failure are:
Other symptoms of heart failure can include:
See your GP if you experience persistent or gradually worsening symptoms of heart failure.
The symptoms can be caused by other, less serious conditions, so it's a good idea to get them checked out.
Read more about how heart failure is diagnosed.
Call 999 for an ambulance or go to your nearest accident and emergency (A&E) department as soon as possible if you have sudden or very severe symptoms.
This is a medical emergency that may require immediate treatment in hospital.