Chronic obstructive pulmonary disease (COPD) affects more than 6.3 percent of American adults. It's a life-threatening lung disease that kills millions of people every year.
The disease results in the airflow from the lungs becoming obstructed. Living with COPD is difficult due to the many symptoms that result because of it. These symptoms most commonly include difficulty breathing, wheezing, breathlessness, chronic coughing, and abnormal sputum, which is the mixture of mucus and saliva found in the airways. Living with COPD becomes more difficult as these symptoms worsen, making it difficult to do even the simplest tasks, such as walking up and down a set of stairs.