Drinking black rice porridge may cause the phenomenon of black stool, because black rice will contain fiber pigment components, which the body can not absorb, so it will be excreted through the form of stool, so there will be the phenomenon of black stool. Be aware that some diseases can also cause black stools, such as upper gastrointestinal bleeding, commonly the appearance of gastric and duodenal ulcers, do not eat black rice porridge, think that the role of black rice porridge, thus delaying the treatment of the disease. The black stool caused by gastrointestinal bleeding will have some medical history, such as chronic gastritis, enteritis, ulcers and other conditions, the recent use of certain drugs to stimulate the gastrointestinal tract, or the recent irregular life, eating too spicy and stimulating triggers appear. If you have eaten too much black rice porridge and the phenomenon of black stool occurs, the stool will become normal color after excretion.