The color of stool is related to whether there is upper gastrointestinal bleeding or not, and also to the food eaten. When some diseases occur, the color of stool will also change (for example, children with jam-like stool should consider whether there is intussusception, and adults should consider whether there is amebic dysentery). It has nothing to do with skin color! Color of normal stool: The normal colors of stool are yellow and brown. Yellow is the color produced by bilirubin in bile, and brown is formed by indole and iron compounds in feces. Eat more carbohydrates, and the stool is yellow; Protein ate too much, and his stool was brown. If you eat some Chinese medicine, the color of your stool will also deepen. However, food and drugs can also change the normal color of stool. Chlorophyll, chlorophyll preparations, iron preparations (drugs for anemia) and foods with more carbon powder can make them green or black. Therefore, judging the disease according to the color of stool should also refer to other factors. Blood in the stool is attached to the stool surface: when blood is attached to the banana-like visible stool surface, it should be considered as hemorrhoid bleeding. When bleeding is serious, it can be in the form of droplets or jets. When there is little bleeding, there is only blood on the toilet paper. This kind of bleeding is usually blood, without pus and abdominal pain. When suffering from rectal cancer, sigmoid colon cancer, intestinal polyps, rectal ulcers and other diseases, blood can also be seen in feces. Elderly people who don't suffer from hemorrhoids, if they find blood in their stool, should go to the hospital for careful examination to determine whether there is cancer or polyps. Red loose stool: loose stool is red, which should be considered as large intestine mucosal bleeding. This is different from the red color of undigested tomatoes and carrots. Brown stool mixed with mucus and pus is the characteristic of bleeding. If the red loose stool is mixed with mucus and pus, check the large intestine mucosa for inflammation. If the rectal mucosa near the anus is seriously inflamed, it may be accompanied by abdominal pain and increased defecation times. Patients suffering from bacillary dysentery can discharge a small amount of feces with uneven mucus and blood, and there is no bad smell. However, patients with amebic dysentery often excrete jam-like feces, accompanied by putrefaction odor. The flora imbalance caused by the use of broad-spectrum antibiotics can also lead to enteritis. For example, after long-term use of antibiotics to treat tonsillitis, bloody diarrhea suddenly appears, which may be caused by flora imbalance. There is also a non-infectious enteritis-ulcerative colitis, which also has diarrhea similar to dysentery at the beginning, but it is characterized by a long course of disease. Sometimes accompanied by abdominal pain. It should be noted that colon cancer and rectal cancer can also have red loose stools, which are mixed with pus and mucus, accompanied by a special smell. Patients defecate frequently, sometimes they feel urgency and then they feel heavy. At this time, it is easy to be confused with ulcerative colitis, so we should find a specialist to check it in time. Retardation: when there is a large amount of bleeding (at least 60 ml of blood) in esophagus, stomach, duodenum and small intestine, it is found to be sluggish. It is black, shiny and smelly. Tar-like stool is mostly loose stool, but it also has a shape. Lateness is more common in duodenal ulcer or gastric ulcer bleeding. In addition, it can also be seen in esophageal vein tumor bleeding, persistent vomiting after overeating, and vascular rupture and bleeding at the junction of esophagus and gastric mucosa. What can't be ignored is small intestinal ulcer, cancer and so on. Sometimes produce tarry stool. Diarrhea of common color: Sleeping with a cold, catching a cold, eating too much or being too cold will all cause diarrhea, mostly yellowish brown loose stools. Generally, there is no fever and abdominal pain is not serious. Although these symptoms are not serious, necessary treatment is needed. Fecal thinning or flattening: this is a dangerous signal. Generally, in the late stage of rectal selection, due to intestinal stenosis, the shape of stool may change (thinning and flattening). At this time, patients are often accompanied by abdominal distension, abdominal pain, emaciation, general weakness, loss of appetite and other symptoms. When inflammatory masses or large polyps appear in the intestinal cavity, you should go to the hospital immediately.