Fire is a folk saying, mostly referring to the internal fire, which may occur clinically when Chen Pi is taken internally in water. Pericarpium Citri Reticulatae has the effects of regulating qi and strengthening the spleen, and can be used for diseases such as distention and fullness in the epigastrium (stomach and abdomen). Drinking water with Chenpi every day may lead to internal fire, because Chenpi is a warm and dry Chinese medicine, the main effects of which include regulating qi, strengthening the spleen as well as drying dampness and resolving phlegm, etc. It is mainly used for diseases such as bloating in the epigastrium and abdomen, eating less, vomiting and diarrhea, coughing, and having a lot of phlegm. The moderate amount of tangerine peel in water has the effect of regulating qi, strengthening the spleen, drying dampness and resolving phlegm. However, as Chen Pi is a warm drug, drinking it in water every day may lead to internal fire, mouth and tongue sores, sore throat, dry stools and other symptoms, especially for those who are weak in yin and easy to catch fire. It should be noted that the adverse reactions of Chenpi have not been clarified, but if the patient is allergic to Chenpi, he or she should not use Chenpi in water to drink, to prevent allergic symptoms such as respiratory difficulties and generalized rashes. Daily use of Chen Pi to drink water may appear internal fire, it is recommended that patients avoid using Chen Pi infused water when there is no relevant indications in the body. In addition, the infusion is different from decoction, can play a limited medicinal effect, can not replace the drug treatment of disease. Discomfort should be timely medical treatment, under the guidance of the doctor to choose medication, not self-medication, so as not to cause damage to the body.