Flatulence and black feces are related to eating blood tofu, gastrointestinal bleeding, constipation and other reasons.
1. Eating blood tofu: blood tofu is made of animal blood, which is similar to human blood, and the stool discharged after eating will also be black, coupled with eating cold food it is easy to have bloating.
2. Gastrointestinal bleeding: the main reason for black stools in gastrointestinal bleeding is that the iron ions in the blood change from trivalent to divalent, and since most of the ferrous iron is black in color, the color of the stools can also be black. Symptoms such as vomiting blood, blood in the stool and black stool can also occur.
3. Constipation: If the food exists in the intestines for too long, the water in the feces is absorbed in large quantities which can lead to dryness of feces, and black feces, blood in feces, and bloating can easily occur during defecation.
Bloating and black feces may also be caused by other reasons, it is recommended to consult a doctor to clarify the cause of the disease and then give targeted treatment or therapy.