Pericarpium Citri Reticulatae plus Semen Xia, Citrus Aurantium Citri Reticulatae, Dried Ginger, Sinapis helps to resolve white phlegm, which is often cold and damp, and Pericarpium Citri Reticulatae itself is an essential medicine for treating cold and damp phlegm. White phlegm is often considered to be cold phlegm or damp phlegm, and besides being white in color, it is thin or sticky in texture. Normally, Chen Pi can be used in combination with other herbs such as Pinellia and Poria, mainly for the treatment of damp phlegm. Besides, Chen Pi can also be added with Chinese herbs such as Gan Jiang, Xin Xin and Wu Wei Zi, which are mainly used to treat cold phlegm. Secondly, Chen Pi and Citrus aurantium are also used together, to a certain extent, to resolve phlegm and eliminate lumps, regulate the middle and dry dampness. If Chenpi is not used in combination with other herbs, it can by itself have the effects of drying dampness and resolving phlegm (removing phlegm from the body with dampness-drying medicines), regulating qi and strengthening the spleen (regulating qi and strengthening the spleen), and also resolving white phlegm, which can be used clinically for treating cold-phlegm coughs, paralysis of the chest, vomiting, and eructation (hiccups), among other conditions. For patients who need to apply drugs to resolve white phlegm, they must follow the doctor’s instructions to use a combination of drugs, do not use on their own, so as not to delay the condition.