可以发生在原来正常的肺，亦可在原有支气管炎或其他呼吸道疾病(例如支气管扩张症或肺癌)的基础上再发生本病。
It may occur in previously normal lungs or be superimposed on underlying bronchitis or other respiratory disease, e. g. bronchiectasis or carcinoma.
方法根据中华医学会呼吸病分会制定的支气管哮喘防治指南的诊断和分度标准，选择轻中度支气管哮喘患者81例。
Method According to the criterions of diagnosis and degree established by Respiratoy Branch of Chinese Medicine Academy, 81 patients of mild or moderate bronchial asthma was selected.
内科方面：慢性支气管炎、支气管哮喘、慢性胃炎、消化性溃疡、糖尿病、慢性盆腔炎、痛经等。
In internal medicine: chronic bronchitis, bronchial asthma, chronic gastritis, peptic ulcer, diabetes mellitus, chronic pelvic inflammatory disease and algomenorrhea, etc.
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