What's the matter with the black, thin stool in the toilet?

1. Physiological factors may be excessive intake of black food or iron-containing food, such as black rice, black beans, duck blood, etc., may also be taking some drugs, such as potassium bismuth citrate tablets, ferrous sulfate tablets, ferrous succinate tablets, etc., resulting in black thin stool. 2. Gastric ulcer is usually caused by Helicobacter pylori infection, taking non-steroidal anti-inflammatory drugs, drinking and other factors. Patients may bleed due to ulcer site, so that blood stays in the intestinal tract for a long time. When going to the toilet, stool is black thin. 3. Intestinal cancer is generally caused by diet, genetics, digestive tract diseases and other factors. If the tumor in the patient's intestine breaks, bleeding, blood is digested and absorbed in the intestinal tract, stool may appear black thin when going to the toilet.