When there is fire in the intestines, most of these people will have dry stools and constipation because the intestines are too dry and will absorb too much water from food residues. The main treatment for people with fire in the intestines is to use drugs with laxative effect, such as Wu Ren Wan, which has the effect of moving Qi and nourishing Yin, laxative effect, so it helps to relieve the symptoms of fire in the intestines, and the side effects caused by the drug are relatively small. Niuhuang Qingzhiwan is a common Chinese medicine, relatively bitter and cold, not only has the effect of diarrhea stomach heat, but also has the effect of clearing intestinal fire, for intestinal fire, constipation and other symptoms have regulatory effect. Lactulose is a western medicine with a high osmotic effect, which can keep the intestinal tract lubricated, so it can not only eliminate intestinal fire, but also have a relieving effect on constipation.