Chinese medicines for liver qi stagnation (poor transport of qi and blood in the liver, emotional depression) usually do not cause diarrhea when drunk, but for some people who are prone to diarrhea due to spleen and stomach deficiency (weak and cold spleen and stomach), drinking Chinese medicines may lead to diarrhea. 1. Chinese medicines for treating liver-qi stagnation are usually based on liver-expelling and regulating qi (regulating the stagnation of liver qi), strengthening the spleen and nourishing the stomach, etc., and generally fewer medicines with cold taste are added to them, so they usually won’t cause diarrhea if you drink them. For some cold medicines, such as heat-clearing and detoxifying (removing heat and toxicity from the body), heat-clearing and fire-dispersing (removing heat and fire from the body), it is easy to have diarrhea after drinking it; 2. For people with liver-qi stagnation, some of them will have weak spleen and stomach, which is considered in Chinese medicine as the liver wood can easily attack the spleen and earth, leading to the symptoms of less energy and diarrhea. Therefore, for those who also have a weak spleen and stomach, they may have diarrhea if there is a slight deviation in the nature of the medicine. At this point, one should seek medical advice to adjust the Chinese medicine prescription before taking it further.