Why is my shit yellow?

Besides gastrointestinal peristalsis, the human body also relies on gastric juice and bile to help and promote the digestion of food (bile plays an important role in the digestion and absorption of fat). Among them, bile is golden yellow or yellowish brown, which makes the stool yellow.

The feces of healthy people are brown, and the change of feces color is closely related to diseases. White or grayish white: It indicates biliary obstruction, with the possibility of gallstones, biliary tumor or pancreatic head cancer. In addition, gray feces can also be seen after barium meal radiography, which is not caused by physiological feces. There are many white water samples (that is, white turbid liquid with rice swill-like feces), which are common in cholera. White oily: large amount and foul smell, common in pancreatic diarrhea or malabsorption syndrome. White mucilage: It may be chronic enteritis, intestinal polyp and tumor. Dark yellow: It can be caused by congenital defects of red blood cells, hemolytic bacterial infection, falciparum malaria, blood group incompatibility transfusion, poisoning of certain chemicals or toxins, and various immune reactions (including autoimmunity). Green: watery or mushy, with sour taste and foamy appearance, which is common in diseases such as indigestion and intestinal dysfunction. If the green stool is mixed with pus, it is the manifestation of acute enteritis or bacillary dysentery. In addition, eating a lot of food containing chlorophyll, or the acidity in the intestine is too high, will also make the feces turn green. Pale red: Like washing meat and watery stool, this kind of stool is the most common in summer, because some pickled products contaminated by halophilic bacteria are eaten; It is common in diarrhea caused by Salmonella bacterial infection. Bright red: common in lower gastrointestinal bleeding. The outer layer is stained with blood, with a small amount, accompanied by intense energy, and the pain disappears after defecation, which is anal fissure; If the blood is bright red in color, unequal in quantity or in blood lump form, and adheres to the outer layer of feces, and does not mix with feces, the blood or blood clot can be washed away with water, which may lead to internal hemorrhoid bleeding. If the blood is bright red and mixed with feces, it may be caused by intestinal polyps or rectal cancer or colon cancer. Dark red: Because blood and feces are evenly dark red, also known as jam color, it is common in amebic dysentery, colon polyps and colon tumors. Another situation is that normal people will have dark red stools when they eat too much coffee, chocolate, cocoa, cherries and mulberries, which should be distinguished from the above diseases. Black: Because the same road is tar-like, it is also called tar stool, which is a common stool for upper gastrointestinal bleeding. Include duodenal ulcer, gastric ulcer, antritis, wax prolapse, esophageal and gastric variceal bleeding due to liver cirrhosis, etc. However, eating too much meat, animal blood, liver, spinach, oral iron, bismuth, activated carbon and so on. Feces can also be black and should be distinguished. Wash the black stool with water. If it is bloody, it is gastrointestinal bleeding. As the saying goes, "Ten men have nine hemorrhoids". Daily stool bleeding, people often think of hemorrhoids, but ignore the possibility of colorectal cancer. For hematochezia, we should first be alert to the possibility of cancer. This is especially important for the elderly!