支气管哮喘是儿童期较常见的一种变态反应性疾病。是一种以嗜酸粒细胞、肥大细胞和T淋巴细胞反应为主的气道变应性炎症和气道高反应性为特征的疾病。临床表现为反复发作伴有哮鸣音的呼气性呼吸困难。是儿童期常见的慢性疾病,严重威胁儿童健康。近几年其发病率和死亡率均呈上升 Bronchial asthma is a more common childhood allergic disease. Is a disease characterized by allergic airway inflammation and airway hyperresponsiveness, mainly eosinophils, mast cells and T lymphocyte reactions. Clinical manifestations of recurrent wheeze accompanied by expiratory breathing difficulties. Is a common childhood chronic disease, a serious threat to children’s health. In recent years, its morbidity and mortality are on the rise