哮喘是一种严重威胁人类健康的慢性呼吸道疾病。目前我国至少有千万余患者,全世界则有超过1.5亿的病人,近十年来多数国家的患病率、病死率日趋升高,尤其是儿童患者不断增多,个别国家儿童患病率高达30％以上,哮喘作为严重的公共卫生问题正引起世界各国的极大关注。任何年龄都能患哮喘,其中约80％的哮喘是在儿童期发病,一旦患了哮喘就难以自愈,有的迁延终生。哮喘的病程是发作与缓解反复更迭,发作时胸憋、喘息、咳嗽、呼吸困难,甚至危及生命;缓解期健如常人,生活、学习和工作都不受影响。患病早期发作轻,持续时间短,间歇时间长,随病程延续,发作频繁,严重度升级,有的发作呈持续状态,不仅给病人带来极大痛苦,也给家庭和社会增加精神压力和经济负担。由于哮喘病程迁延,病情反复,难以根治, Asthma is a chronic respiratory disease that is a serious threat to human health. At present, there are at least 10 million patients in our country and there are more than 150 million patients in the world. The prevalence and mortality of most countries in the past decade have been on the rise. Especially in the growing number of children, the prevalence of children in some countries is as high as 30 %, Asthma as a serious public health problem is arousing great concern of all countries in the world. Asthma can develop at any age, of which about 80% of asthma is in childhood, it is difficult to self-healing once asthma, and some life-long delay. The course of asthma is the onset and mitigation of repeated changes, the onset of chest choke, wheezing, coughing, breathing difficulties, and even life-threatening; remission of healthy people, life, learning and work are not affected. Sick early episodes of light, short duration, intermittent long time, with the continuation of the course of the attack, the severity of escalation, some episodes were sustained, not only brought great suffering to patients, but also to families and society to increase mental stress and economic burden. Due to the protracted course of asthma, repeated illness, difficult to cure,