What's wrong with dark green and black stool

1, diet factors

in a short time intake of a large number of dark foods or foods containing more iron, such as spinach, pig blood, duck blood, etc., resulting in gastrointestinal can not be fully absorbed, resulting in dark green stool black.

2, gastric ulcer

patients due to Helicobacter pylori infection, long-term use of non-steroidal anti-inflammatory drugs and other factors leading to gastric mucosal damage, the formation of ulcers, bleeding can cause dark green stool black.

3, rectal cancer

patients due to environmental, dietary, genetic and other factors combined to cause rectal cancer, cancer rupture bleeding can appear dark green, black stool symptoms.