Blood in the stool often makes people panic, but what is the disease that causes blood in the stool? Here is how to recognize the disease based on the blood in the stool. Blood in the stool, as the name implies, is blood in the stool, which is blood coming out of the anus. The color of the blood can be bright red, dark red, or dark brown, and if a small amount of bleeding may not cause the color of the stool to change, a stool test is needed to determine this, which is called “occult blood”. According to the site of bleeding, there are upper and lower gastrointestinal bleeding. Upper gastrointestinal bleeding is mostly black stool with a shiny, tarry surface, or sometimes a paste like coffee; while blood in the stool from anorectal disease is lower gastrointestinal bleeding and is mostly fresh blood. The following is a discussion of the identification of common blood in stool in anorectal diseases. If the stool and blood are separate and the blood is bright red, the lesion is mostly in the area closer to the anus, such as internal hemorrhoids, anal fissures, rectal polyps, and anorectal cancer. If the blood is squirting, accompanied by dry mouth, red tongue, thin yellow coating, and floating pulse, it mostly belongs to wind-heat intestinal dryness type, such as stage I internal hemorrhoids; if the blood is dark red and comes out in drops, accompanied by thirst without desire to drink, falling heaviness in the lesser abdomen, red tongue, yellow greasy coating, and slippery pulse, it mostly belongs to damp-heat downward injection evidence, such as stage II internal hemorrhoids, anal papilloma co-infection, rectal polyps, and anorectal ulcer; if there is blood clot caught, or red and white mucus, accompanied by If the stool is mixed with blood and is obscure in color, and the lesions are mostly in the area above the sigmoid colon, it belongs to the type of damp-heat and blood stasis, such as colorectal carcinoma, early stage of colorectal cancer, colorectal melanoma, etc. It is usually accompanied by abdominal discomfort below the navel, mucousy mouth, yellow tongue, and slippery pulse; If it is mucus blood stool, it is mostly radioactive intestinal disease, among which mucus yellow cloudy, tongue red, moss yellow greasy belongs to damp-heat cross-steaming type, mucus white cloudy, tongue light, moss white greasy belongs to cold condensation damp obstruction type, mucus thin, poor fatigue, tongue light, moss thin white belongs to spleen and stomach weakness. The blood in the stool is mostly benign disease for a long time, or the late stage of malignant diseases of the anus and intestines, if accompanied by palpitations and insomnia, weakness, lack of color, mostly belongs to blood deficiency intestinal dryness or spleen deficiency loss of control, or liver and spleen deficiency type; if the fruit of the face is as gray as earth, the tongue is dark, the pulse is sunken and thin, mostly belongs to the two deficiencies of qi and blood and qi stagnation and blood stasis type. Blood in the stool is a sign of disease. It is important to pay enough attention to the blood in the stool, which can be big or small, to get a clear diagnosis as soon as possible, and timely treatment to nip the disease in the bud.