What is a chronic cough? 

Most coughs are short term and get better on their own. But when a cough lasts for weeks, it may need more attention. 

3 Weeks or Less: A cough that lasts less than three weeks is called an acute cough. This is often linked to a cold or other short-term infection. 

3-8 Weeks: A cough that lasts three to eight weeks is called a subacute cough. This can happen after a respiratory infection and may take longer to settle. 

8 Weeks or Longer: A cough that lasts eight weeks or longer is called a chronic cough. Chronic cough can affect sleep, energy, daily activities, and quality of life. Canadian research has found that chronic cough affects about 16% of adults aged 45 to 85.  

What can cause a chronic cough? 

A chronic cough can have many possible causes, and it is not always a sign of a serious illness. Common causes include: 

• asthma 
• postnasal drip, also called upper airway cough syndrome 
• acid reflux, also called GERD 
• smoking or exposure to smoke 
• some medications, especially ACE inhibitors 
• a cough that continues after a respiratory infection  

Sometimes more than one cause is involved. 

Why finding the cause matters 

Finding the cause of your cough can help your healthcare team recommend the best treatment. Even when the cause is not clear right away, there may still be ways to reduce coughing and make day-to-day life easier.  

When to talk to a healthcare provider 

You should speak with a healthcare provider if your cough: 

• lasts more than three weeks 
• is getting worse instead of better 
• is affecting your sleep or daily activities 
• comes with shortness of breath, chest pain, fever, or coughing up blood 

To learn more about chronic cough including helpful tips and resources visit the Canadian Lung Association