The digestive system of infants and young children is not yet mature, so if they eat too much or too often, it will increase the burden on the gastrointestinal tract, and the intestines cannot adapt to such changes, which will lead to digestive disorders. In case of artificial feeding, the water temperature of milk powder is too low or too high, frequent change of milk powder, irregular feeding time, etc., all will lead to the dysfunction of the intestinal environment, causing imbalance of intestinal flora and indigestion. The artificial feeding formula lacks secretory IgA and other humoral factors contained in breast milk and has weak anti-infection ability, while the artificial feeding food and eating utensils are easily contaminated, which can lead to intestinal infection and indigestion, green stool, foam in the stool, and the patient will have diarrhea, even blood in the stool, so you can choose probiotics to regulate intestinal flora and observe the changes in the condition.