Chronic obstructive pulmonary disease is a serious chronic respiratory disease with high morbidity and mortality. Patients with advanced disease will have the following typical symptoms: 1. At the beginning, they often appear in daily life activities, and when they develop to a certain extent, they will also have difficulty in breathing when resting in bed, and this symptom will gradually increase. 2. Patients will feel a loss of appetite, weight loss, depression, and inability to eat, which seriously affects normal life, so relevant treatment must be carried out when diagnosed in the early stage.