What causes intestinal blackening?

colon melanosis is caused by the

presence of lipofuscin-like substances in macrophages in the colon proper membrane, resulting in pigmentation of local mucosa, and constipation, the use of laxatives and other factors.

3

, colon cancer

is a malignant tumor of intestinal wall cells, tumor formation will cause intestinal obstruction and ischemia, necrosis, which may lead to blood coagulation in intestinal mucosa tissue. At this time, hemoglobin decomposition products will penetrate into stool or rectal secretions, so that intestinal blackening.