What happens when black is often pulled?

Black stool refers to the discharge of black stool, often black stool may be caused by stomach surgery stimulation, chronic gastritis, gastric ulcer and other reasons, as follows:

1, stomach surgery stimulation

patients take stomach surgery, may lead to stomach bleeding, thus stimulating intestinal motility too fast, leading to black stools.

2, chronic gastritis

patients due to gastric mucosa damage, after eating food or drugs, may lead to black stools.

3, gastric ulcer

patients with bleeding, trivalent iron ions in the gastrointestinal tract after the influence of acid, pepsin and other substances, may appear stool color change.