Nasal congestion can be caused by lung fire, or it can be caused by wind-cold binding the lungs, wind-heat offending the lungs (wind-heat evil qi invading the lungs), insufficient lung qi, or weak spleen qi (weak spleen qi). 1. Lung fire: It is mainly due to the residual evils of external infection not yet cleared, and the lung meridian heat is stored for a long time and turns into fire, which interferes with the nasal orifices and leads to nasal congestion. 2. Wind-cold binds the lung: due to the external wind-cold, guest in the muscle surface, the evil offender lung Wei, lung qi does not propagate leading to nasal obstruction. 3. Wind-heat: Due to wind-heat, the lungs are not propagated, resulting in nasal congestion and yellow snot. 4. Lung qi insufficiency: due to the deficiency of lung qi, the lungs do not have the ability to propagate the lungs, leading to nasal congestion. 5. Weakness of spleen qi: due to the inability of the spleen to transport and transform water and dampness, resulting in a failure of elevation and elevation, clear and turbid, phlegm and drink (pathological products of impaired metabolism of water and fluid) stopping and gathering in the nasal cavity, resulting in nasal congestion. Nasal congestion is mainly due to various factors leading to the failure of the lungs to pronounce and purge. If the patient is not feeling well, it is recommended to consult a doctor in time to identify the cause of the disease and carry out diagnosis and treatment.