Baby drinking 2-segment milk powder diarrhea may be related to low temperature when feeding milk powder, protein allergy, unreasonable milk powder concentration, lactose intolerance and other reasons. 1. Low temperature when feeding milk powder: when the temperature of the milk powder that the baby drinks is low, it will cause irritation to the gastrointestinal tract, which will lead to the baby’s diarrhea. 2. Protein allergy: if the baby is allergic to protein, it may induce intestinal allergic reaction, causing intestinal inflammation, and diarrhea will occur. 3. Unreasonable concentration of milk powder: If the concentration of milk powder is too thick, it will increase the burden of digestion and absorption in the gastrointestinal tract, which will lead to diarrhea in babies. 4. lactose intolerance: 2 paragraph formula contains lactose, for such as lactose intolerant baby, lactose can not be fully absorbed in the small intestine, which leads to high osmotic pressure in the intestinal lumen, the symptoms of diarrhea. When the baby drink 2 paragraph formula milk powder diarrhea has not been relieved, should be timely to the regular hospital pediatrics, identify the cause of the disease, and under the guidance of the doctor for treatment.