The normal state of baby’s stool is related to the way of breastfeeding, exclusively breastfeeding is usually golden yellow soft stools, formula feeding or adding complementary food is usually yellow or light brown lumpy stools, mixed feeding of infants is usually normal stools are yellow. 1. Breastfeeding: For infants who are exclusively breastfed and do not add other foods, the normal stools are usually soft golden-yellow in color, with occasional greenish color, and about 4 times a day, with slight variations among individuals. 2. Formula feeding: If infants are fed with formula milk, normal stools are usually yellow or light brown. If the iron content in the food is high, green stools can occur, and the number of bowel movements may be about once a day. 3. Mixed feeding: mixed feeding is breast milk plus milk powder or plus complementary food, generally mixed feeding normal stools are yellow, if not normal circumstances may be white, may also be black. Infants are judged only by the nature of the stool, as long as the diet and mental state is normal, then it is normal. However, if an infant has abnormal stools with mucus, pus and blood, or if the frequency is too high or too low and accompanied by poor mental status, it is important to consult a doctor to check the cause.