What Causes It?
Smoking tobacco
Long-term exposure to air pollution
Occupational exposure to dust and chemicals
Genetic factors (Alpha-1 antitrypsin deficiency)
History of respiratory infections
Aging
Signs & Symptoms
Shortness of breath, especially during physical activities
Wheezing
Chest tightness
Chronic cough with or without mucus
Frequent respiratory infections
Lack of energy
Unintended weight loss (in later stages)
Swelling in ankles, feet or legs
Bluish discoloration of lips or fingernail beds (cyanosis)