The side effects of dried tangerine peel will cause abnormal vomiting. Chenpi can promote digestion and improve gastrointestinal function. Slightly stimulating digestion can promote the secretion of digestive juice and eliminate intestinal pneumatosis. It has a weak expectorant effect on the volatile oil of the drug itself, and is contraindicated for people with dry cough due to yin deficiency. Do not use for spontaneous sweating, hematemesis and acne rash grouting.