Insufficient qi in speech is a Chinese medicine term, which is actually clinically suggestive of varying degrees of dyspnea, with varying degrees of obstruction and restriction of the airway, which triggers deficiencies in ventilation and air exchange. More common are diseases of the respiratory system itself, including infectious and non-infectious factors. Infectious factors, such as acute pharyngolaryngitis, acute exacerbation of chronic asthmatic bronchitis, pneumonia, pleural effusion caused by pleurisy, lung abscess, etc.. Non-infectious factors, including bronchial asthma and idiopathic interstitial fibrosis. All of these diseases will lead to edema and congestion of the airway mucosa, and accompanied by secretion oozing out to form phlegm plugs to block the airway, and even accompanied by the contraction of the airway smooth muscle, which will make the airway become narrow, and there is a lack of air in the middle of the speech.