A runny nose may be due to spleen deficiency, but it is mostly caused by lung qi deficiency and external wind-cold. Runny nose is called snot, snot is the mucus secreted by the nasal cavity, according to Chinese medicine theory, snot is the fluid of the lungs. According to Chinese medicine theory, snot is the fluid of the lungs. Most of the snot is caused by the attack of the six elements (wind, cold, summer, dampness, dryness, and fire), which leads to the loss of the lung’s circulation, or the deficiency of qi and yang, which leads to the loss of the fluid’s retention. The new disease runny nose is mostly due to external symptoms (feel the external evil mainly manifested as respiratory symptoms), accompanied by nasal congestion, belongs to the wind-cold symptoms; repeated paroxysms of runny nose, the amount of more like a note, accompanied by nasal itching patients, belongs to congested nose, due to the lung qi is weak, the surface of the defenders are not solid, the external wind-cold caused by the. In addition, insufficient spleen yang, dampness gathered as phlegm, and upward offense to the lungs can also lead to the nose running clear water. It should be noted that if the patient has clear water flowing from the nose, it is recommended to go to a regular medical institution for treatment immediately to avoid delaying the condition.