While the chronic cough may be the most common symptom of COPD, the excessive sputum production is the most distinctive characteristic. In other words, you will notice mucus associated with the cough. This sputum might be white, yellowish, or even clear. In rare cases, it may look pale green. Besides spitting up the mucus, it will also cause congestion in the chest. Patients with COPD generally have difficulties breathing, especially in the morning because of the excessive mucus. As the years pass, and the disease advances, more mucus will appear more frequently. If people continue to smoke throughout the phases of COPD, it will only speed up the complications.
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