The green color of baby’s stool may be a normal physiological phenomenon, or it may be a symptom of certain diseases, such as indigestion, intestinal infections, etc., and you should consult a doctor in time to find out the cause of the disease. 1. Physiological phenomenon: most newborn babies have dark green stools, which belong to fetal stools. Fetal stools are mixed with intestinal wall cells, fetal membranes, fetal lipids and bile mucus, etc. Therefore, the color of fetal stools is dark green or greenish, which is a normal phenomenon, and the fetal stools can be drained within 2~4 days after birth. 2. Pathological factors: (1) Indigestion: If infants are not fed properly, or if they are fed too much at one time, the digestive burden on the gastrointestinal tract will be increased, which may cause indigestion and greenish-colored stool, usually accompanied by postprandial fullness, abdominal distention, epigastric discomfort, regurgitation, and so on. (2) Intestinal infections: Infants with low immunity are susceptible to invasion by viruses, bacteria and other pathogens, leading to intestinal infections, resulting in green stools, accompanied by diarrhea, vomiting and other symptoms, and in severe cases, can also cause dehydration and electrolyte disorders. Infant stool green, there may also be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.