Under normal circumstances, most of the baby’s stool is yellow, if the baby’s stool is dark green, it may be related to the following factors. First of all, dark green stools are common in babies who eat formula. Most of the current formula will include iron, which will lead to dark green stools in children, often related to incomplete absorption of iron, as long as the baby grows and develops well, it is not considered pathological and does not require special treatment. If the baby’s stool is green and accompanied by vomiting, bloating, diarrhea and slow growth, then we should consider that the baby may be intolerant to milk powder, that is, there may be problems such as milk protein allergy, but the color of the stool and allergies are not directly related, if the child is confirmed to have milk protein allergy, it is recommended to switch to amino acid milk powder or deeply hydrolyzed protein milk powder. Some children may also have dark green stools when they have diarrhea if they have a cold abdomen. Some babies have dark green stools when they eat foods that contain chlorophyll, such as various green vegetables. For a newborn baby, dark green stools are normal, and fetal stools are basically dark green in color. After the child is fully fed, the fetal stool is gradually eliminated and slowly transitions to normal stool. For children with anemia, in the process of iron supplementation treatment, the stool is often dark green, this is because iron combines with hydrogen sulfide in the intestine, forming black iron sulfide, so it will lead to the phenomenon of dark green stool, which is a normal physiological phenomenon, do not worry, after the discontinuation of iron, the color of the stool will gradually return to normal. The dark green color of baby’s stool is a common phenomenon. Most of them are physiological, parents do not need to be anxious, generally take probiotics conditioning can be significantly improved.