First, what is blood in stool? Blood in stool refers to the bleeding in the digestive tract of the human body from the anus out of the body, such as stool is completely blood, stool with blood, bleeding while relieving stool, blood dripping after stool, blood on the stool paper, etc., the color is bright red, dark red or tar-like, are called blood in stool. Blood in stool is usually seen in the lower gastrointestinal bleeding, refers to the occurrence of the digestive tract below the flexor ligament including the small intestine, colon and rectum and anal canal, especially the bleeding of the colon and rectum, but occasionally seen in the upper gastrointestinal bleeding (refers to the point of bleeding is located in the flexor ligament above the gastrointestinal tract, including the esophagus, stomach and duodenum, etc.). What are the causes of blood in stool? Blood in stool mainly comes from the intestinal tract itself, most of which belong to the category of anorectal diseases, such as intestinal tumors such as colorectal cancer and polyps, ulcers, inflammation, parasitic diseases, hemorrhoids, anal fissure, intussusception, bowel dryness abrasion and so on. In addition, it can also come from diseases of systems other than the intestinal tract such as blood diseases, acute infectious diseases, vitamin deficiencies, poisoning or toxic effects of drugs. Third, how to determine the cause of bleeding from the color and other traits of blood in stool? 1. The color of blood in stool depends on the location of gastrointestinal bleeding, the amount of bleeding and the time the blood stays in the intestine. 2.Blood in stool in children is characterized by bright red blood, painless, and unmixed blood and stool, mostly caused by rectal polyps. 3, adults blood in the stool is characterized by hemorrhoids, anal fistula, anal fissure, colorectal polyps, colorectal carcinoma, bacillary dysentery and other causes. 4, especially need to cause a high degree of vigilance is, in the many anorectal diseases, not only hemorrhoids can cause blood in the stool, other anorectal diseases such as anal fissure, rectal polyps, colonic polyps, ulcerative colitis, especially colorectal cancer and so on will appear in the stool with blood. With the improvement of living standard and the change of dietary structure in China, the incidence of colorectal cancer is obviously increasing and on the rise. Therefore, patients above middle age should attach great importance to the change of stool habit, diarrhea or constipation, thinning of stool, stool with mucus, pus and blood, especially bloody stool, and consult doctor as early as possible to confirm the diagnosis of the disease, so as to get a complete cure as early as possible. Fourth, hemorrhoids cause blood in stool characteristics: blood in stool generally occurs in the process of defecation or after defecation, was dripping blood or jet, blood color bright red, blood and feces do not mix, the amount of bleeding varies, light only for the stool bleeding, heavy each time a few milliliters of bleeding to more than ten milliliters, the frequency of bleeding, light intermittent bleeding in the stool, the heavy every time in the stool is bound to bleed, the timing of the bleeding, feces hard and dry, or eat chili peppers and other stimulating food, the most likely to occur or aggravate, bleeding, the bleeding of feces and other stimulating foods. Bleeding time, when the feces is dry and hard, or when eating irritating foods such as chili peppers, it is most likely to occur or aggravate. 1, anal fissure caused by blood in the stool features: blood in the stool, blood color bright red, dripping or hand paper after wiping the blood, and there is intense pain in the anus after the stool. 2.Colorectal polyps: bright red blood, slight pain, blood and stool do not mix. 3.Ulcerative colitis causes blood in stool: bleeding mixed with mucus or pus and blood stool, accompanied by abdominal pain, fever, frequent stool, etc.. 4.Characteristics of blood in stool caused by colorectal cancer: blood is bright red or dark red, attached to the surface of stool in the form of drops, pus and blood stool often appears in the late stage, and blood, mucus and feces are often mixed with each other, accompanied by anorectal dropping, emaciation, change of bowel habit and other symptoms. 5, to determine the cause of blood in the stool: mainly through the anorectoscope and fiber colonoscopy plus pathology biopsy to confirm the diagnosis. Fifth, black stool and how is it? Black is that the stool is black or brownish-black, also known as tarry stool, for the upper gastrointestinal bleeding is one of the most common symptoms. Upper gastrointestinal bleeding is mainly manifested as black stools, often accompanied by vomiting blood, palpitations, fatigue, anemia and other signs and symptoms. If the amount of bleeding is small, and the speed is slow, the blood stays in the intestine for a long time, due to the role of gastric acid discharged stool is black; if the amount of bleeding is more, in the intestine stays for a shorter time, the blood discharged is dark red; the amount of bleeding is particularly large, and quickly discharged can also be bright red. What is occult blood stool? Where a small amount of gastrointestinal bleeding does not cause changes in stool color, only in the laboratory fecal occult blood test positive, known as occult blood stool. All diseases that cause gastrointestinal bleeding can cause occult blood in stools, such as gastric ulcer and gastric cancer. The fecal occult blood test detects a small amount of blood in the stool. Multiple, persistent positive occult blood test suggests chronic bleeding in the digestive tract, and should be further examined, such as fiberoptic gastroscopy with biopsy, etc., to be alert to the presence of gastrointestinal tract tumors. What are the necessary tests for patients with blood in stool? 1.Anal diagnosis: anal diagnosis is a reliable and simple method to detect rectal cancer in time. 2.Anal proctoscope: simple, safe and reliable. It is worth reminding that one should go to regular anal and intestinal specialty hospitals and find doctors specialized in anal and intestinal examination to confirm the diagnosis. 3, fiber endoscopy such as fiber colonoscopy and gastroscopy: a decisive means of confirming the diagnosis of the lesion, can biopsy qualitative, and at the same time have a therapeutic role. 4, X-ray film such as barium enema: can clearly localize the lesion. 5, Abdominal B-ultrasound or CT, MRI examination. 6, selective angiography: can clarify the site of bleeding, at the same time have a therapeutic effect. What are the dangers of blood in stool? Blood in stool easily makes the body lose a lot of iron, causing iron deficiency anemia. Generally, it develops slowly, and there can be no symptoms or mild symptoms in the early stage. When the anemia is more serious, there will be pallor, tiredness, loss of appetite, palpitation, accelerated heart rate and shortness of breath after physical activities, swelling, etc. Some patients may even have neurological symptoms, such as agitation, excitement, and irritability. Blood in stool can cause infection, leading to sepsis and toxemia, resulting in anal pain and bowel obstruction. At the same time, blood in stool is also an early signal of intestinal malignant tumors. As the situation of blood in stool is similar to bleeding hemorrhoids, it is difficult for the general public to distinguish it, together with the fact that some people do not pay enough attention to it, so that the early malignant tumors are easily ignored and tragedy is caused. Clinically, 80% of early rectal tumor patients have been misdiagnosed and missed because of neglecting blood in stool, thus delaying the time of complete cure of rectal tumor. In addition, it is worthwhile to pay great attention to the fact that some patients with blood in stool have both hemorrhoids and colorectal cancer, but hemorrhoidal bleeding is often covered up by the hemorrhoids, thus delaying the best time for colorectal cancer to be completely cured. Therefore, after the occurrence of blood in the stool, you must consult an experienced specialist, do not be sloppy, not to mention that you can not get away with it. Finding the right doctor is very crucial to the cure of the disease. How to face and deal with blood in stool? Blood in the stool does not need to be too nervous, should immediately go to the hospital, as soon as possible to clarify the cause of the disease, especially to find a specialist doctor to do the relevant specialist examination, do not give yourself to see the doctor and miss the best time to cure. After clarifying the cause of the disease, and then for the cause of the treatment, the right medicine. For example, hemorrhoids caused by blood in the stool, according to hemorrhoids treatment.