Si Mu Tang can treat constipation. Si Mu Tang is a Chinese medicine that consists of Mu Xiang, Citrus aurantium, Wu Yao and Betel nut. It is effective in smoothing Qi and lowering rebelliousness, eliminating stagnation and relieving pain (eliminating stagnation and relieving pain). It is used in infants and young children for symptoms of internal stagnation of milk and food, such as abdominal distension, abdominal pain, crying, anorexia, diarrhea or constipation; and in middle-aged and old people for symptoms of stagnation of qi and accumulation of food, such as distension and fullness of the epigastric region, abdominal pain, constipation, and so on. From the above, it can be seen that Si Mu Tang can treat constipation. The adverse effects of Si Mu Tang are not clear. It should be noted that pregnant women, intestinal obstruction, intestinal tumors, digestive tract after surgery is prohibited. If there is a need for medication, it should be used under the guidance of a doctor’s diagnosis, and should not be used blindly on its own, so as not to cause adverse consequences.