Repeated attacks of asthma for long periods can weaken the lung, spleen and kidney. Lung qi deficiency may results in failure of weiqi to protect the body against diseases and the disease is more likely to recur due to exogenous pathogenic factors. Spleen deficiency may bring about failure in transporting function and produce phlegm in the lung. Kidney deficiency may cause failure of receiving qi by the kidney; and kidney yang deficiency causes accumulation of pathogenic fluid that may transform into phlegm, while kidney yin deficiency induces hyperactive fire to scorch the body fluid into phlegm, which moves upwards and stays in the lung, thus worsening the condition. Integration of Chinese medicine and western medicine would be a good choice for this disease. When treating bronchial asthma, Chinese doctors will take everything into consideration.