Two days did not defecate, defecate can blacken

Two days without stool, stool will not turn black, need to be combined with the specific situation analysis.

Two days without stool may be related to a variety of reasons, such as daily intake is relatively small, intake of dietary fiber or the existence of constipation, etc., in these cases if there is no intake of iron or dark pigment components of food or medicine, usually will not lead to stool black. However, if there is gastrointestinal bleeding, such as chronic erosive gastritis, gastric ulcer, duodenal ulcer, or stomach cancer, the blood reacts chemically with gastric acid, which when mixed with stool usually causes the stool to turn black.