Chenpi in water can be directly put the right amount of Chenpi into a container, pour boiling water to brew and drink. Pericarp has the effect of regulating qi and strengthening the spleen (regulating qi and strengthening the spleen), and drying dampness and resolving phlegm (removing phlegm in the body by drying dampness). 1. Qi stagnation: Pericarpium Citri Reticulatae has the efficacy of moving qi, and can be used to regulate qi stagnation and qi retrogression caused by epigastric distension, vomiting and nausea, and can be combined with Hovenia Citri Reticulatae and Mucuna Pruriens. 2. Phlegm and cough: Pericarpium Citri Reticulatae can dry dampness and dissolve phlegm, regulate the lungs and relieve cough, used for cough and wheezing caused by the loss of lung declination and internal stagnation of phlegm and dampness, it can be combined with Hanxia, Poria and other drying and dampness and phlegm removing medicines. In modern clinical practice, Chenpi is also used to treat sleep apnea hypoventilation syndrome and posterior circulation ischemic vertigo. The effective dose of Chenpi in water is limited, it is difficult to achieve the above effects, it is recommended to follow the doctor’s instructions for medication.