Chronic obstructive pulmonary disease (COPD) is characterized by

Chronic obstructive pulmonary disease (COPD) is the most common chronic disease of the respiratory system. The main manifestation of this type of patient is severe cough, and some people cannot rest at night. The second one is sputum. In the chronic stage, it may be white sputum. If it is acute, it may show thick sputum or sputum color change, and sputum volume increases. In addition, one of the important manifestations of COPD is asthma, which will show difficulty breathing. COPD is characterized by severe coughing. The second is expectoration, which may be white in chronic phase and may show thick sputum, increased sputum volume or change in sputum color in acute attack. The third is asthma, which may cause breathing difficulties.