If the stool is black, it may be caused by gastrointestinal bleeding, constipation and dietary factors, which need to be analyzed specifically.
1. Digestive bleeding: upper gastrointestinal bleeding, such as gastric ulcer, gastric cancer, acute erosive gastritis, etc., the blood is oxidized when passing through the digestive system, generating ferrous sulfate, resulting in black particles in the stool, in addition to the stimulation of the digestive system will lead to faster intestinal peristalsis, accompanied by abdominal pain and diarrhea symptoms.
2. Constipation: Constipation will lead to long time storage of feces in the intestinal tract, feces is too dry, causing granular feces, leading to feces stored in the intestinal tract for too long, causing excessive compression of feces, feces deepen in color.
3. Dietary factors: If patients consume a lot of animal blood and animal liver and other foods, and dietary fiber intake is insufficient, it may lead to slow intestinal peristalsis, causing granular stools. At the same time, because the food residue contains more iron, so the stool is often mainly black.
It is recommended that patients need to rule out dietary factors first, and then promptly go to the regular hospital for examination and treatment.