支气管哮喘的病因和发病机理比较复杂,至今尚未完全明了。一般认为遗传过敏体质与本病关系较为密切。按发病机理哮喘分为外源性和内源性两大类。 1.外源性哮喘患者多有遗传过敏体质,其家庭及个人常有哮喘、婴儿湿疹、湿疹、荨麻疹、过敏性鼻灸等病史。提示哮喘可能有多基因的遗传基础。多数认为,具有过敏体质(特应性体质)的人, The etiology and pathogenesis of bronchial asthma is more complicated and has not yet been fully understood. Generally believed that the relationship between allergic constitution and the disease is more closely. According to the pathogenesis of asthma is divided into two categories of exogenous and endogenous. 1. Exogenous asthma patients and more allergic constitution, their families and individuals often have asthma, eczema, eczema, urticaria, allergic rhinitis and other medical history. Prompt asthma may have a multi-gene genetic basis. Most believe that people with allergies (atopic constitution)