支气管哮喘(简称哮喘)是一种常见的,发作性的,肺部过敏性疾病。发作一般有季节性。由于发病时细支气管平滑肌的痉挛、黏膜充血、水肿和分泌物增加,患者有胸闷、气急、哮喘、咳嗽和咳痰。但哮喘的病因仍不明确。在现代医疗条件下,哮喘发病率为何迅速增加仍不得而知。环境的污染 Bronchial asthma (asthma) is a common, episodic, pulmonary allergic disease. Seizures are generally seasonal. Because of the onset of bronchiole smooth muscle spasm, mucosal congestion, edema and increased secretions, patients with chest tightness, shortness of breath, asthma, cough and sputum. But the cause of asthma is still not clear. Under the modern medical conditions, the rapid increase in the incidence of asthma is still unknown. Environmental pollution