Upper gastrointestinal bleeding feces are generally bloody, or there may be no special smell, according to the amount of bleeding, bleeding time analysis is as follows:
1. Bloody smell: due to upper gastrointestinal bleeding, a large number of red blood cells from the blood vessels to the intestinal tract, with the feces out of the body, if the amount of bleeding is greater than 50 ml of black stools, and the bleeding in the body stays for a short period of time, the feces generally have a bloody smell, and the color of the stool is tar-like color, i.e., tar-like stool.
2. No special smell: when the upper gastrointestinal bleeding is less than occult blood in the stool (bleeding volume of 5-10ml), there is generally no special smell, due to the small amount of bleeding, the intestinal tract can self-absorb after the destruction of red blood cells, which will not cause changes in the characteristics of the feces.
When there is black stool and feces obviously bloody odor, it is recommended that patients go to the regular hospital for gastroscopy in a timely manner, gastroscopy to stop the bleeding treatment, and to clarify the cause of the disease, treatment of the primary pathology, do not avoid medical treatment, delay the best time for treatment.