Understanding COPD

Key Information

• What is it? COPD (Chronic Obstructive Pulmonary Disease) is a group of lung conditions that cause breathing difficulties.
• The Cause: It is usually caused by long-term damage to the lungs, most commonly from smoking over many years.
• The Worry: Being told you have COPD can feel worrying. Understanding what is happening in your lungs is the first step to taking control.

The Analogy: New vs. Damaged Sponges

To understand COPD, think of your lungs like sponges.

• Healthy Lungs (New Sponges): They are springy and easily push air out.
• COPD Lungs (Damaged Sponges): They lose their springiness, meaning they cannot fully push out old air. This makes it harder to breathe fresh air in.

Why Does This Happen?

This damage occurs for two main reasons:

• Chronic Bronchitis: The airways become inflamed, narrowed, and produce more mucus.
• Emphysema: The tiny air sacs in the lungs become damaged and lose their elasticity.

Main Symptoms

Because the lungs are not working as efficiently, you may experience:

• Breathlessness: Especially during activity.
• Persistent Cough: A long-standing cough, often with phlegm.
• Frequent Infections: Chest infections occurring more often than usual.
• Wheezing: A whistling sound when breathing.

The Outlook

While existing lung damage cannot be reversed, there is a lot we can do to help you live well with COPD.

• Manage your symptoms effectively.
• Slow the progression of the condition.
• Improve your quality of life.

What Happens Next?

If you are experiencing symptoms or need support managing COPD, please contact us.

Further Information

For more information about COPD, including symptoms, treatment and living with COPD, please visit the NHS website.

Last reviewed: 31 March 2026
Next review due: 31 March 2029