What is the reason for the dense black spots in stool?

Stool has dense black spots first consider is due to dietary factors, such as food with black spots or too much melanin content, resulting in intestinal tract is not fully absorbed will be excreted, is a normal physiological phenomenon. Secondly, stool has black spots also consider the existence of bleeding points in the intestinal tract caused, such as intestinal polyps, duodenal ulcers and intestinal space-occupying lesions, will lead to patients appear such phenomenon. If the symptoms are only occasional, do not worry too much. If it persists, it is necessary to see a doctor in time for examination.