An ongoing cough is a symptom of COPD, especially when it comes with mucus. It isn’t pleasant, but there are ways to manage it. Doctors use stages to describe how severe your COPD is.

A 2019 study involving 1,290 people with COPD found that 1 in 2 people had severe fatigue ... your risk of COPD exacerbations. In the later stages of COPD, this may be life threatening.

The test measures things such as lung volume, capacity and gas exchange, and a particularly low score can be an indication of COPD. There are four stages of COPD: mild, moderate, severe and very ...