Bronchial asthma and emphysema are two different diseases. Bronchial asthma typically manifests as episodic coughing, chest tightness, and wheezing. Patients often develop this condition in childhood and adolescence, and it is relatively rare in the elderly. Emphysema, on the other hand, is often related to long-term smoking and is usually seen in middle-aged and older patients. Early stages of emphysema may only be evident on a chest CT and may not show significant symptoms of chest tightness. However, as the disease progresses, patients often experience noticeable chest tightness and difficulty breathing, and the condition tends to progressively worsen. Patients typically eventually develop complications such as chronic respiratory failure and chronic pulmonary heart disease. Therefore, the characteristics of bronchial asthma and emphysema are different. However, it is important to note that in patients with bronchial asthma, if the condition is not controlled and continues to progress, it might also lead to the development of emphysema, chronic respiratory failure, pulmonary heart disease, and other related conditions.