In Chinese medicine theory, the development of disease from the superficial to the internal process is called: Wei, Qi, Ying and Blood transmission change. The cold and runny nose is the result of feeling the evil of wind and cold, and the wind and cold take advantage of the deficiency to enter when the righteousness is insufficient, and the muscle surface and the exterior of the body are not fixed, and the lung loses the propagation and descent, which results in a series of symptoms of wind and cold superficial symptoms, such as clear nasal runny nose, no fever, fear of cold, cough and sputum. If the disease is not treated in time, the superficial evil can easily enter the interior and turn into heat, resulting in unfavorable nasal orifices, yellow snot, coughing yellow phlegm, swelling and pain in the mouth and throat, and dry stools.