咳嗽变异性哮喘(CVA)是以嗜酸性粒细胞和肥大细胞参与的、持续高反应为特征的慢性气道炎症,运动、天气变化、烟尘等常为其诱因。咳嗽变异性哮喘是一种特殊类型的哮喘,咳嗽是其唯一或主要临床表现,无明显喘息、气促等症状或体征,临床上容易误诊、误治。为提高对本病的诊治水平,? Cough variant asthma (CVA) is a chronic inflammation of the airway that is characterized by persistent hyperactivity and eosinophils and mast cells. Exercise, weather, and smoke are among the most common causes of CVA. Cough Variant asthma is a special type of asthma, cough is its only or main clinical manifestations, no obvious wheezing, shortness of breath and other symptoms or signs, clinically easy to misdiagnosis, mistreatment. To improve the diagnosis and treatment of the disease,?