COPD: Different stages

4 stages are used to describe how severe your COPD is, using the GOLD grading system. This system is based on your symptoms’ severity and on your result from a breathing test called spirometry.

A spirometry test basically measures how much air you can breathe in and out and how quickly and easily you can exhale.

  • Stage I – Mild: Symptoms may not be noticeable. You might be short of breath when walking fast or climbing a slight hill.
  • Stage II – Moderate: Symptoms worsen from stage I. Coughing and mucus production may become more severe, and you may experience shortness of breath when walking or exercising.
  • Stage III – Severe: You may have trouble catching your breath doing household tasks and may not be able to leave your house.
  • Stage IV – Very Severe: You’ll likely have frequent flare-ups that can be potentially fatal. You may have trouble breathing even when you’re resting. You’re at risk of developing heart or lung failure.

Detecting and treating early-stage COPD is essential to slowing the progression of the disease. If you are experiencing any early warning signs like shortness of breath and a persistent cough, make an appointment with your doctor to determine what’s causing your symptoms.

Early COPD screening is especially important if you smoke since you face a greater risk of developing this lung disease.

Updated on April 4, 2025

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