在右侧的支气管软骨和左侧充满粘液的支气管腔之间，平滑肌增生，水肿，炎症（主要是嗜酸性粒细胞）等因素使粘膜下层增厚。这些是支气管哮喘的病变。哮喘发作时外周嗜酸细胞计数或痰嗜酸细胞计数增加。
Between the bronchial cartilage at the right and the bronchial lumen filled with mucus at the left is a submucosa widened by smooth muscle hypertrophy, edema, and inflammation (mainly eosinophils). These are changes of bronchial asthma. The peripheral eosinophil count or the sputum eosinophils can be increased during an asthmatic attack.
