Chen Pi has the effects of regulating qi, strengthening the spleen, drying dampness and resolving phlegm (expelling dampness by drying dampness and resolving phlegm), and can be used for constipation caused by qi deficiency. It is not suitable for constipation caused by yin deficiency and intestinal dryness as the bitter and warm nature of the drug is prone to injure fluid. Chenpi is mainly used as a decoction for internal use. Chenpi is the dried mature fruit peel of orange and its cultivated varieties in the family of Rutaceae. It is bitter, pungent and warm in nature, and belongs to the lung and spleen meridians. It has the effects of regulating qi, strengthening the spleen, drying dampness and resolving phlegm, and can be clinically used in the treatment of epigastric (abdominal) distension, low food intake and vomiting and diarrhea, coughing and phlegm, and so on. When using Chen Pi, it should be noted that due to the bitter and warm nature of the drug, it is easy to hurt the yin fluid, so the constipation caused by yin deficiency and intestinal dryness should not be used alone with Chen Pi, can be paired with drugs that have the effect of nourishing yin and moistening the intestines, such as flaxseed and uliparasite, etc.. Constipation patients, it is recommended to go to a regular hospital, under the guidance of a professional physician to identify the treatment.