Asthma is a kind of episodic phlegm asthma disease, to the throat croup sound, dyspnea, or even wheezing can not lie down the main symptom of recurrent pulmonary disease. Asthma later medical practitioners in view of asthma must be concomitant wheezing, it is also known as asthma, and wheezing may not be concomitant asthma, in order to differentiate from the asthma evidence, it is named asthma, asthma evidence. Asthma is a common, chronic respiratory disease, bronchial asthma in Western medicine, asthmatic bronchitis, eosinophilia caused by asthma belongs to the category of this disease. The cause of asthma is phlegm in the lungs. Phlegm is mainly due to the dysfunction of internal organs, the lungs can not spread fluid, the spleen can not transport the essence, the kidneys can not vaporize the water, so that fluid cohesion into phlegm, hidden in the lungs, and become a disease of the “long-standing root”. Triggered by triggers such as exogenous sensations, diet, emotions, labor and fatigue, phlegm obstructs the airway, and the lung qi goes upward, resulting in contracture of the airway. If the body appears asthma-like discomfort, should promptly go to the hospital, after a clear diagnosis by the standardized treatment, do not take it lightly, so as not to delay the condition.