Salty phlegm is cold. Phlegm is mucus discharged from the lungs and airways, thick and turbid in nature; salty is a taste, an abnormal taste in the mouth, combined with phlegm, it feels like phlegm is salty; Chinese medicine believes that among the five tastes, salty enters into the kidneys, so if there is a disease of the kidneys or a flood of cold water, salty taste will appear in the mouth. Spleen is the main transportation (spleen has the function of digesting food, absorbing food essence and water and transferring it to the whole body), water and dampness, spleen deficiency can not transport water and dampness, dampness will be gathered and produce phlegm; spleen is the foundation of the day after tomorrow, the kidney is the foundation of the day before tomorrow, the foundation of the day after tomorrow needs to be nourished by the foundation of the day before tomorrow. Therefore, when the spleen is deficient, the kidneys will not be nourished by the essence of water and grains, which will gradually lead to kidney deficiency. When the kidney is deficient and cold water floods the mouth with phlegm, a salty taste will appear. At this time, we need to treat the spleen and kidneys together, under the guidance of traditional Chinese medicine practitioners to identify the symptoms of the disease, through the preparation of tonics for treatment, and it is best not to eat greasy food during the treatment period.