Normal stool: Breastfed infants have soft golden-yellow stools. For milk-fed infants, the stool is light yellow and dry. If the stool smells bad, it is a poor digestion of protein; if there are milk flaps in the stool, it is a soap lump made of undigested fat and calcium or magnesium; if the stool is scattered and unshaped, we should consider whether the amount of supplemental food has been increased or the supplemental food is not soft enough, which affects digestion and absorption. If you find that the stool is gray, hard and smelly, it means that there is too much milk and too little sugar, so you need to change the ratio of milk and sugar. For artificially fed babies, if the stool is dark green and mucus-like, it means that the milk supply is not enough and the baby is in a semi-starvation state, so sugar, rice soup, milk and milk substitute should be added. If an artificially fed child has eczema and has diarrhea for a long time, and repeated stool tests have red and white blood cells, consider the possibility of milk protein allergy. If the infant is given green leafy vegetables, the stool may be somewhat green; if the infant is given tomatoes, the stool may be somewhat red. These are normal phenomena and parents should not worry too much. However, when mucus and pus appear in the stool, the frequency of stool increases, and the stool is as thin as water, it means that the child may have an infectious disease of the intestinal tract. Parents should not take this disease lightly and should keep a little stool so that they can get a timely laboratory test at the hospital and treat the disease for their child according to the cause.