The digestive system of small infants is very young and there are many reasons why babies may suffer from indigestion. Such as infection, inflammation of the gastrointestinal tract, congenital lactose intolerance, improper feeding, improper care, etc. Small babies’ digestive organs are not well developed, the secretion of digestive juices is not sufficient, the function of enzymes is not perfect, the stomach and intestinal mucosa is tender, gastrointestinal peristalsis is slow, the intestinal flora is not fully established, the spleen and stomach function is weak, if parents can not feed correctly, the child will appear bloated, vomiting, thin stools, sour smell, and a lot of undigested food residues and other indigestion performance. 1, improper feeding: (1) to the baby to eat difficult to digest food; (2) food with the unreasonable; (3) to the baby to try too much new food; (4) ate too much. This can lead to baby indigestion. 2, infection factors: some viral infections, such as norovirus, rotavirus, these viral infections may lead to baby indigestion. Also like bacterial infections can easily lead to infectious diarrhea in babies. 3, gastrointestinal tract inflammation: when the baby suffers from gastrointestinal tract inflammation, the digestive function of the gastrointestinal tract will be greatly reduced. 4, abuse of antibiotics: In recent years, the massive use of antibiotics has made people’s bodies resistant to drugs and resistance to decline. And the baby’s gastrointestinal function itself is not well developed, will aggravate the baby’s indigestion symptoms. 5, lactose intolerance: some babies are intolerant to lactose, in this case the baby will also appear indigestion. Some babies are allergic to milk powder will also appear indigestion. 6, improper care: improper care of the baby in the usual care process, resulting in the baby’s abdomen cold, this situation will also lead to baby gastrointestinal disorders, indigestion symptoms. In addition to the above factors, the cold weather, low body resistance, food allergies food intolerance can also cause indigestion. Long-term indigestion in young children can cause insufficient nutritional intake and affect growth and development.