When Lung Qi is stagnant or Deficient (because, for instance, of Wind-Cold), Phlegm-Fluids (a type of Phlegm characterized by white, very watery and thin sputum) accumulates in the Lungs because they cannot fulfill their function of sending the Fluids down to the Kidneys or to the skin and muscles. See our chapter on the formation of Body Fluids for an explanation of this process.

This leads to symptoms such as coughing and wheezing (with copious, white, watery sputum), a stifling sensation in the chest, and, in very severe cases, difficulty in breathing while lying down. The symptoms of absence of thirst and the moist tongue coating indicate a overabundance of Fluids in the body. All the symptoms tend to be aggravated by exposure to Cold.