During the acute exacerbation of chronic obstructive pulmonary disease, patients are mainly encouraged to cough and cough up sputum, mainly by turning them over and patting their backs to make them cough and cough up sputum. A light diet and rest should be maintained. If acute exacerbation occurs several times, long-term low-flow oxygen inhalation is generally recommended, which is conducive to the recovery of patients with chronic obstructive pulmonary disease. During acute exacerbation, rehabilitation exercises are also important, which include exercising respiratory muscles and exercising diaphragmatic breathing. The patient is also encouraged to strengthen coughing, or to perform postural drainage so that the patient can cough up deep sputum.