What reason is old person defecate black

summary

In our daily life, black stool is too common in the elderly. Generally speaking, whether there is black stool or not, some people will be surprised or insipid, depending on the location and amount of bleeding and the length of blood stay in the gastrointestinal tract. For example, hemorrhoids and anal fissure are characterized by bloody stool; colorectal polyps, rectal cancer and colon cancer are usually characterized by bloody stool or purulent blood stool due to their location close to the anus and less bleeding. What's the reason for the black stool of the old man.

What reason is old person defecate black

First: the amount of bleeding is an important factor in determining whether there is black stool. It is generally believed that the daily amount of bleeding in 50 ~ 70 ml or more, can cause black stool. This is because only enough blood is destroyed can a certain amount of iron sulfide be formed, otherwise the stool will not be dyed black stool.

Second: another determinant is that blood should stay in the gut long enough. For example, even if the upper part of the small intestine is bleeding, if the intestinal peristalsis is too fast and the blood stays in the intestinal tract for a short time, the discharged stool can still be dark red. If the amount of bleeding is large, the stool can be bright red.

Third: on the contrary, if the elderly suffer from constipation, even if it is colon bleeding, because the blood stays in the intestine for a long time, there is enough time for the blood to be destroyed, so as to form a sufficient amount of iron sulfide and make the stool black.

matters needing attention

Most of the young and middle-aged patients with upper gastrointestinal bleeding had abdominal pain, upper abdominal discomfort, hiccup and other gastrointestinal disorders before bleeding, and only 19% of them had no symptoms, while 39.8% of the elderly had no feeling before upper gastrointestinal bleeding due to insensitivity or slow response. Even if there is some discomfort, it is not accurate. When the bleeding accumulates to a certain amount and hematemesis or melena suddenly occurs, the condition is very serious. Therefore, the elderly's mild abdominal discomfort, gastrointestinal symptoms, and even restlessness and other emotional changes should not be easily let go. We should pay attention to find traces of upper gastrointestinal bleeding.