Green fecal matter could indicate a biliary problem. Conditions causing impaired bile absorption result to greenish stool appearance. Moreover, a number of green leafy vegetables remain green and it reflects on your stool. Fecalysis is required to come up with accurate findings.
There are several reasons why a bowel movement might look green in color, and not all of them are anything serious. Eating green foods, and having a case of diarrhea can also cause a green bowel movement.