Three-month-old babies with yellow diarrhea, usually because of digestive problems, such as indigestion, abdominal cold, intestinal flora imbalance, improper diet, etc., need to be treated according to different types of symptomatic treatment, and if necessary, timely medical care. 1, indigestion: breast milk is rich in nutrients, the baby’s ability to digest is very limited, feeding more than the baby’s digestive capacity, the baby will be indigestion and diarrhea yellow diarrhea, discharge excess food, generally control the amount of milk feeding can recover by itself. General control of the amount of breastfeeding can recover on their own; 2, abdominal cold: temperature changes faster, or in and out of the air-conditioned room when the baby may catch a cold, the abdominal skin feel a lower temperature, the bowel movement slows down, the food can not be fully absorbed, only through diarrhea discharged, manifested as yellowish thin stools, you can use hot compresses for the abdominal heat preservation, but also can be used to regulate the external pediatric umbilical cord sticker; 3, intestinal dysbiosis: If the baby has a long-term Indigestion, intestinal flora imbalance may occur, the baby frequent diarrhea, may appear yellow loose stool or even watery stool, you can go to the hospital pediatrician, after stool examination and bacterial culture, oral counterpart probiotic agent; 4, dietary improprieties: three-month-old baby’s digestive system is not fully developed, usually only milk or milk powder, not able to add supplemental food, if this time to eat carrots, pumpkin and other Yellow food, the baby can not be digested, will be diarrhea, stool color by the food color, so that the baby pull yellow dilute stool, as long as to stop premature complementary feeding, resume breastfeeding, generally can be restored on their own; 5, gastrointestinal tract infections: if the baby in addition to pull the yellow dilute stool, accompanied by fever, pus and blood stools and other conditions, may be due to dietary impurity caused by the gastrointestinal tract bacterial or viral infection, the need to consult a doctor for examination in a timely manner, determine the cause of infection, symptomatic application of antibiotics and so on. The cause of the infection should be examined by a doctor to determine the cause of the infection, and antibiotics and other medications should be applied to treat the symptoms. Three-month-old babies will excrete a lot of water when diarrhea, should be moderate amount of warm water to prevent dehydration, diarrhea is serious need to use rehydration salts under the guidance of the doctor. During the treatment period, the baby should be breastfed a small number of times, to control the amount of feeding, breastfeeding mother’s diet to reduce the intake of spicy stimulating foods, such as chili peppers, peppercorns, etc., and eat less overly greasy food, you can eat tofu, crucian carp, red bean soup, etc., to replenish the nutritional needs of breastfeeding.