The reason for dark green poop may be the excessive intake of green food, or there is intestinal inflammation or indigestion. Green vegetables will contain chlorophyll, and chlorophyll will not be absorbed and utilized by the body, and will be excreted directly. Therefore, when the intake of green food is too much, chlorophyll will accumulate in the feces, and the color of feces will become dark green. Secondly, when there is dark green stool with bloating and diarrhea at the same time, it may be caused by intestinal inflammation and indigestion. Intestinal inflammation and indigestion will lead to the food residue in the intestines for a short period of time, and at this time, bilirubin will be oxidized by acid to biliverdin, resulting in the formation of dark green feces. If accompanied by abdominal distension, abdominal pain and epigastric discomfort, prompt medical attention is required.