Obstructive lung disease, or COPD, is a common preventable and treatable disease. Symptoms of the disease include respiratory symptoms such as chronic cough, sputum and wheezing and systemic symptoms such as fatigue and loss of appetite. 1. Respiratory symptoms: The typical symptoms of obstructive pulmonary disease are chronic cough, sputum and wheezing. The symptoms are: obvious cough in the morning; sputum is mostly white foamy sputum, and when combined with acute infections, the amount of sputum increases, and even pus sputum; dyspnea occurs during strenuous activities, and some of the more serious patients also have dyspnea in daily life or even when resting. In addition, some patients also have wheezing and chest tightness. 2. Systemic symptoms: patients with advanced obstructive pulmonary disease may also experience weight loss, fatigue and loss of appetite. Warm reminder: once diagnosed, patients with obstructive pulmonary disease should quit smoking, avoid colds and flu, and actively treat the disease under the guidance of doctors.