Thank you very much for contacting healthcare magic. Green stool most common cause is iron therapy. Iron therapy may cause green stool problem. Sometime food indigestion may cause green stool. Leafy vegetables in digestion may cause green stool. Intestinal infection may cause this type of problems. Do stool examination test for diagnosis. By this test we can know which type of infections is present. Wish you a goid health. Take care. .Thank you.