Weakness of speech and lack of gas are relatively common symptoms in life, which can be caused by physiological factors, such as physical weakness and fatigue, or pathological factors, such as suffering from emphysema, pulmonary heart disease and other respiratory diseases, which need to be combined with other physical symptoms to make a comprehensive judgment. First, physiological factors people are particularly weak or too tired, aging, there will be weakness in speech, lack of gas phenomenon. At this time, some nutrition can be added to enhance physical fitness. At the same time, attention should be paid to rest and avoid strenuous exercise and heavy physical labor when feeling weak. Second, the pathological factors 1, respiratory system diseases: such as emphysema, pulmonary heart disease, in the advanced stage of the patient’s gasping for air will also become difficult, speaking more weak; 2, ear, nose and throat diseases: common such as vocal cord disorders, vocal cord paralysis, bad vocal cord vibration, airway narrowing, these conditions will also lead to weak speech, gas deficiency; 3, neurological diseases: such as Parkinson’s disease, generalized hypertonia, some times breathing difficulties. When speaking, the throat muscles also due to increased muscle tone, speaking airflow issued or vocal cord vibration have been very difficult, will also be manifested as weak speech, gas deficiency; 4, cerebrovascular disease: cerebrovascular disease caused by pseudobulbar palsy, can lead to swallowing difficulties, hoarseness, speaking gas deficiency and other symptoms; 5, tumor disease: to the late stage of the tumor appear hypertrophic, extreme malnutrition, not only is weakness in speech, but also very thin; 6, other diseases: myasthenia gravis, respiratory muscle paralysis and other diseases, can also lead to weakness in speech and lack of air symptoms.