Herbal medicines for treating phlegm (a pathological product of impaired water-liquid metabolism) include Cynanchum officinale (旋覆花), Baiqian (白前) and Qianhu (前胡). 1. Forsythia: It has the effects of lowering qi, resolving phlegm, lowering rebelliousness and stopping vomiting (stopping the upward rush of gastric qi and stopping vomiting). It is used to treat cough and phlegm, phlegm and drink accumulation, chest and diaphragm lumpiness (stomach distension and discomfort), yelping (hiccups), vomiting, and pain in the chest and ribs (chest and ribs area). Yin deficiency consumptive cough, fluid injury and dry cough should not be taken. 2. Baiqian: It has the effect of lowering qi and resolving phlegm. It is used to treat cough with excessive phlegm and shortness of breath. Lung deficiency, asthma and cough with caution. 3. Radix et Rhizoma Pinelliae: for phlegm-heat cough, wind-heat cough. Caution should be exercised in patients with yin deficiency cough and cold-drinking cough. If you need to use the drug, you should be identified by a doctor and follow the doctor’s instructions for standardized treatment.