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COPD
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Older Adults

COPD (Chronic Obstructive Pulmonary Disease)

COPD is a group of progressive lung diseases that obstruct airflow, making it increasingly difficult to breathe over time.

Overview

Normally, the airways and air sacs in your lungs are elastic. When you breathe in, airways deliver air to the air sacs, which inflate like small balloons; when you breathe out, they deflate. In individuals with COPD, airflow is restricted due to several factors:

  • The airways and air sacs lose their elasticity.
  • The walls between many air sacs are destroyed.
  • Airway walls become thick and inflamed.
  • Excessive mucus production clogs the airways.

Types of COPD

COPD generally encompasses two primary conditions, though most patients experience a combination of both:

  • Emphysema: Damage to the air sacs and the walls between them, resulting in reduced elasticity.
  • Chronic bronchitis: Constant irritation and inflammation of the airway lining, leading to swelling and mucus production.

Causes & Risk Factors

The primary cause of COPD is long-term exposure to lung irritants. In the United States, cigarette smoke is the leading cause, though pipe, cigar, and other inhaled tobacco smoke also contribute. Other environmental factors include secondhand smoke, air pollution, and workplace chemical fumes or dust. Rarely, a genetic condition called alpha-1 antitrypsin deficiency can cause the disease.

Key risk factors include:

  • Smoking: The primary risk factor; up to 75% of those with COPD smoke or have a history of smoking.
  • Age: Symptoms typically begin at age 40 or older.
  • Genetics: Including alpha-1 antitrypsin deficiency or a family history of the disease.
  • Asthma: While most people with asthma will not develop COPD, those who have it are at a higher risk.

Symptoms

Symptoms often start mild and worsen over time. They include:

  • Frequent coughing or a cough producing significant mucus.
  • Wheezing or a whistling/squeaky sound during breathing.
  • Shortness of breath, particularly during physical activity.
  • Chest tightness.

Severe cases may lead to frequent respiratory infections, weight loss, muscle weakness, and swelling in the legs, feet, or ankles.

Diagnosis

Healthcare providers diagnose COPD by evaluating:

  • Medical and family history.
  • Symptoms.
  • Diagnostic tests, including lung function tests, chest X-rays, CT scans, and blood tests.

Treatment & Management

While there is no cure for COPD, treatments can manage symptoms and slow disease progression.

  • Lifestyle Changes: Quitting smoking is the most critical step. Patients should also avoid lung irritants and work with providers on nutritional plans and safe physical activity to strengthen breathing muscles.
  • Medicines: Bronchodilators (often via inhaler) relax airway muscles; some include steroids to reduce inflammation. Vaccines for flu and pneumonia are recommended, and antibiotics are used for bacterial infections.
  • Oxygen Therapy: Used for severe cases with low blood oxygen levels.
  • Pulmonary Rehabilitation: Programs offering exercise, training, and nutritional or psychological counseling.
  • Surgery: Considered a last resort, options include removing damaged lung tissue or large air spaces (bullae), or in severe cases, a lung transplant.

Seek emergency care for severe symptoms like difficulty breathing or speaking. Contact a provider if symptoms worsen or signs of infection, such as fever, appear.

Prevention

The most effective prevention is avoiding smoking and minimizing exposure to secondhand smoke, air pollution, and industrial irritants.

Frequently Asked Questions

You should seek immediate emergency medical care if you experience severe or sudden worsening of your breathing difficulties, such as extreme shortness of breath that makes it hard to speak, blue discoloration of your lips or fingertips (cyanosis), confusion or disorientation, rapid heart rate, or a sudden increase in coughing with more mucus than usual, especially if it's discolored. These could be signs of a severe COPD exacerbation requiring urgent treatment.
While the primary cause of COPD is long-term exposure to lung irritants like cigarette smoke, there can be a genetic component. A rare genetic condition called alpha-1 antitrypsin deficiency significantly increases the risk, even in non-smokers. Additionally, a family history of COPD, even without this specific deficiency, can indicate a higher genetic predisposition, especially if combined with environmental risk factors. It's important for your children to be aware of their increased risk and to strictly avoid smoking and other lung irritants. They should discuss their family history with their doctor for personalized advice and potential screening.
Early signs of COPD often develop gradually and can be mistaken for normal aging or a smoker's cough. Key warning signs include a persistent cough that produces mucus, shortness of breath during everyday activities like walking or climbing stairs, wheezing, and chest tightness. These symptoms tend to worsen over time, so it's important to consult a doctor if you experience them, especially if you have risk factors like a history of smoking.
While quitting smoking is the most crucial step, other important lifestyle changes include avoiding exposure to secondhand smoke, air pollution, and workplace irritants. Regular, moderate exercise, as tolerated and approved by your doctor, can strengthen breathing muscles and improve overall fitness. Eating a healthy, balanced diet helps maintain energy levels and fight infections. It's also vital to get vaccinated against influenza and pneumonia to prevent lung infections, and to adhere strictly to your prescribed medications and pulmonary rehabilitation program.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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