Babies with green loose stools may have physiologic and pathologic causes, such as enteritis. 1. Physiological reasons: (1) If it is a newborn baby, in the week after birth, there may be black-green dilute stools, which is the color of normal fetal stools, and then it will gradually transition to dark yellow-green stools, usually lasting 3-4 days. (2) If the baby is eating complementary food, the complementary food contains a lot of green vegetables, vegetables contain chlorophyll and fiber, chlorophyll can not be fully metabolized, may appear green loose stools, generally do not need to worry. 2. Pathological causes: viruses or E. coli and other infections caused by enteritis, causing indigestion. At the same time, intestinal spasm will be accompanied by obvious abdominal pain, may appear green loose stool. If your baby has a high frequency of green loose stools and other discomforts, it is recommended to consult a doctor for further examination as prescribed by the doctor, to clarify the cause with the help of the doctor, and to carry out targeted treatment or therapy.