Herbal medicines for regulating the large intestine include Bai Tou Weng, Qin Pi, and Huo Ma Ren, etc., which need to be used under the physician’s diagnosis and analysis. 1. Bai Tou Weng: It has the function of clearing heat and removing toxins (clearing heat and toxins from the body), cooling blood and stopping dysentery (clearing heat and cooling blood, eliminating dysentery, etc.), and its taste is bitter and cold, and it belongs to the stomach and large intestine meridian. It is used for the treatment of dysentery caused by heat and toxicity (dysentery caused by heat and toxicity, see blood in the stool), itching and dysentery. Note that patients with cold diarrhea should be cautious. Its adverse reactions are not clear. 2. Qin Pi: It has the function of clearing heat and drying dampness (removing heat and drying dampness), collecting astringent and stopping dysentery, stopping bandages, and clarifying the eyes, with bitter taste, astringency, cold nature, and belonging to the liver, gallbladder and large intestine meridian. It is used for treating damp-heat diarrhea (diarrhea caused by feeling damp-heat evil), dysentery, red eyes and swelling pain. Note that it is forbidden to be taken by people with deficiency and coldness of the spleen and stomach (spleen and stomach weak and cold). Its adverse reactions are not clear. 3. Flaxseed: It has the function of lubricating and laxative, its flavor is sweet, nature is flat, and it belongs to the spleen, stomach and large intestine meridian. Clinically take its lubricating effect, more and more with thick park, ripened rhizome and other traditional Chinese medicines, the treatment of intestinal constipation caused by blood withered. It is also used with rhubarb and white peony to treat constipation due to heat and hemorrhoidal constipation. It should be noted that it should not be used in cases of spleen deficiency with loose stools (thin and unformed feces) and yang deficiency with slippery ejaculation. Its adverse effects are not clear at the moment. All of the above herbal medicines should be used after diagnosis and treatment by a Chinese medicine practitioner, and should not be used on one’s own.