Emphysema may be symptomatic in the later stages of the disease, while lung nodules are mostly benign and usually asymptomatic. Emphysema and lung nodules are more symptomatic than lung nodules. However, the possibility of malignancy must be noted in pulmonary nodules. Both require active prevention and treatment, which can generally improve the progression of the disease. Emphysema is an irreversible disease that damages the alveoli and other airways, usually leading to an increase in the size of the alveolar cavities and lung volume. In the early stages of emphysema, patients may have no obvious symptoms for many years, but due to recurrent infections, the disease may continue to progress, gradually affecting the ventilation function of the lungs, and causing shortness of breath and dyspnea with a little bit of activity. Symptoms of emphysema may be more serious in the later stages, usually with dyspnea, wheezing, chest tightness, etc., and may also cause cyanosis and respiratory acidosis. Aggressive treatment can usually slow the progression of the disease and improve respiratory function. Lung nodules are generally benign in nature, most of them are found during physical examination, the lesions are relatively stable and usually not serious, regular re-examination should be conducted and attention should be paid during the observation period, whether there are symptoms such as coughing, coughing up sputum, low-grade fever, chest pain, chest tightness and so on. In the process of examination, if you find that the lung nodules have a tendency to malignant changes, such as gradual increase in size, CT shows that the edge of the nodule burr sign, lobulation and other changes, you need to consult the doctor in time, to clarify the nature of the positive surgical treatment, if necessary. Patients with emphysema and pulmonary nodules are advised to consult the doctor in time to avoid delaying their condition.