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Why does defecate always slant black recently


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Recently, stool always black may be related to dietary factors, drug factors, disease factors, etc.
1, dietary factors
If the human body recently eats a large number of duck blood, pig blood, animal liver, spinach and other foods, which are rich in iron, iron will occur in the intestinal tract after eating, producing black iron sulfide, and discharged with the feces, it will lead to stool always black.
2, drug factors
If the patient recently takes iron dextran, ferrous sulfate, ferrous succinate, etc., it will lead to stool coloring, and the patient will appear recently stool always black.
3, disease factors
If the patient has gastric ulcer, duodenal ulcer, intestinal polyps, intestinal tumor and other diseases, bleeding at the lesion site, it can lead to stool always black.