Black stools in infants are dark, almost black, and can be caused by constipation, improper diet, and gastrointestinal disorders. If the infant has started to add complementary foods and has consumed darker foods such as mulberries, bok choy and blood tofu, it can make the stool darker and look almost black. This can usually be relieved by stopping the feeding of such foods as appropriate. In addition to black stools, infants also have dry and constipated stools, mostly fire constipation. In this case, you should give your child foods that are well digested and have a lot of fiber, such as vegetables and fruits like bananas, drink more water, and eat appropriate things to reduce fire and relieve heat, which can also solve the problem. However, if the infant’s stool is black and not caused by improper eating or fire, it may be caused by gastrointestinal diseases, such as bleeding from the upper gastrointestinal tract or the infant swallowing bleeding from the mouth and nose, etc. After digestion, the stool will turn black. The infant can be checked for bleeding problems such as the mouth and nose, and if not, diseases such as enteritis or gastrointestinal bleeding should be considered and should be treated by a doctor. For infants with black stools, you can first consider whether there are any problems with the food you eat and whether you are constipated with fire, etc., and then consider bleeding from the mouth and nose and gastrointestinal disorders in order to target the problem.