Whether diarrhea is normal or not after taking Sihui San should depend on the situation. Four Reversible San contains Hovenia dulcis, Hovenia dulcis has the effect of eliminating stagnation and stagnation, so diarrhea may occur, but due to the different constitution of the individual, it may also be due to the intolerance of the drug ingredients, the specific situation is recommended to consult a doctor. The ingredients of Si-Wei San are Chai Hu, Citrus aurantium dulcis, Bupleurum officinale and Paeonia lactiflora, which have the efficacy of penetrating the evil and relieving the depression, dredging the liver and regulating the spleen, and are mainly used for the treatment of lack of warmth in the hands and feet due to the evidence of yang depression and syncope (the poor operation of yang qi leading to coldness in the extremities), and the fullness and distension of the ribs and the abdomen due to the evidence of the lack of liver-spleen coordination. The adverse reactions and contraindications of the drug are not known. Diarrhea after consuming Siwei San may be due to the efficacy of the drug, or it may be due to intolerance to the ingredients of the drug. If diarrhea occurs, stop taking the medicine immediately and consult a doctor at the hospital to find out the cause of diarrhea.