What's the difference between brown and black shit?

The difference between brown and black stools is as follows:

1. Brown stools

Brown stools are a common color produced by a normal healthy digestive system, indicating that food normally passes through the intestine during digestion. May vary depending on diet, but within the normal range.

2. Black stools

Black stools are usually caused by bleeding in the digestive tract. When blood is decomposed under the action of gastric acid, stools will present a black, tarry appearance. It may be a symptom of gastric ulcer, esophageal varices, gastrointestinal bleeding, etc. If you take iron such as ferrous sulfate tablets, dextran iron tablets, ferrous gluconate syrup, or eat chicken blood, duck blood, red dragon fruit and other foods, it can cause black stools.