哮喘一年四季都有发作,虽然立春后气温会逐渐上升,但是温度依然很低。因此,患儿的哮喘复发很多见,家长一定要做好防护工作。哮喘是由多种细胞,如嗜酸性粒细胞、肥大细胞、T淋巴细胞、中性粒细胞及气道上皮细胞等和细胞组分共同参与的气道慢性炎症性疾病。这种慢性炎症导致气道反应性增高,当接触多种致病危险因素时,气道发生阻塞和气流受限,出现反复发作的哮喘、气促、胸闷或咳嗽等症状,常在夜间、清晨发作或加剧。多数患儿可经治疗缓解,也有 Asthma attacks all year round, although the temperature will gradually rise after the spring, but the temperature is still low. Therefore, many children with asthma recurrence, parents must be protective work. Asthma is a chronic inflammatory disease of the airways that is involved in various cell types, such as eosinophils, mast cells, T lymphocytes, neutrophils and airway epithelial cells, and cellular components. This chronic inflammation leads to increased airway responsiveness. When exposed to a variety of risk factors, airway obstruction and airflow limitation, recurrent asthma, shortness of breath, chest tightness or cough and other symptoms, often at night, early morning Attack or aggravate. Most children can be treated to alleviate, but also