Chronic Obstructive Pulmonary Disease (COPD) is an inflammatory response of the airways caused by inhalation of harmful gases or particles such as smoke. Patients may present with chronic coughing and sputum, which is white and frothy, and increased sputum volume when combined with infection. Treatment includes smoking cessation, stabilization treatment, acute exacerbation treatment, and rehabilitation. 1. Smoking cessation: Smoking is the main cause of COPD, and cessation of smoking helps to slow down the rate of lung function decline. 2. Stable phase treatment: according to the needs of the disease, bronchodilators (such as salbutamol, ipratropium bromide, etc.), inhaled glucocorticosteroids (such as fluticasone propionate, budesonide, etc.), expectorant and cough suppressant (such as bromhexine, aminoglutethimide), and other medications will be used to regulate the treatment. 3. Treatment of acute exacerbation: If the symptoms of cough and sputum worsen significantly, the patient should actively consult the doctor to clarify the type of infection. Treatment can increase the type and dose of bronchodilators, oral or intravenous use of theophylline (e.g., aminophylline) and hormones (e.g., methylprednisolone), and antibiotic treatment for those with signs of infection. 4. Rehabilitation therapy: appropriate aerobic exercise, lip-contraction breathing, long-term home oxygen therapy, etc. Although rehabilitation therapy cannot cure COPD, it can effectively reduce respiratory symptoms, improve exercise tolerance and improve the quality of life. Patients with chronic obstructive pulmonary disease should seek medical treatment as soon as possible for standardized treatment, and all the above medications should be used under the guidance of a doctor to avoid self-medication.