COPD is the acronym for Chronic Obstructive Pulmonary Disease. Long-term smoking, air pollution, recurrent respiratory infections, etc. can cause destruction and narrowing of the bronchial walls, which leads to persistent airflow limitation, this is chronic obstructive pulmonary disease. The main clinical manifestations of COPD are cough, sputum, shortness of breath, wheezing and chest tightness. Cough is often pronounced in the morning and may be accompanied by sputum. Coughing sputum is usually white mucus or plasma foam sputum, occasionally with blood, more sputum in the early morning. Acute attack sputum volume increases, there may be purulent sputum; at the same time may be accompanied by post-exertion chest tightness, wheezing, shortness of breath symptoms, severe resting state also have dyspnea. The acute phase of COPD needs to be treated with oxygen, anti-infective (e.g., levofloxacin, ceftriaxone, etc.), airway dilating drugs (e.g., aminophylline, terbutaline, etc.), expectorant (e.g., ambroxol, etc.), and glucocorticosteroids (e.g., methylprednisolone, budesonide, etc.). COPD in remission needs to be treated by smoking cessation, oxygen therapy, use of long-acting airway-dilating drugs (e.g. budesonide formoterol inhaler, tiotropium bromide powder inhaler), and avoiding colds and flu. COPD requires long-term, standardized treatment, and it is recommended to go to the hospital for treatment and avoid blindly using medication on your own.