In general, drinking pregnant women’s milk powder will not cause diarrhea, so drinking pregnant women’s milk powder with diarrhea is an abnormal phenomenon, which may be caused by an allergy to the protein in the milk powder, or may be caused by lactose intolerance or bacterial overload of the milk powder itself. 1. protein allergy: due to individual differences, some people will be allergic to protein, especially to the protein in pregnant women’s milk powder, which will lead to The symptoms of diarrhea will occur because the mucous membrane of the gastrointestinal tract becomes edematous and the peristalsis of the gastrointestinal tract increases; 2. lactose intolerance: some people lack the enzyme to digest lactose, so if they drink pregnant women’s milk powder, the lactose cannot be digested and absorbed well, so diarrhea will occur; 3. the bacteria of the milk powder itself exceeds the standard: if the pregnant women’s milk powder expires or is not well stored, there is bacterial contamination, and drinking such milk powder may lead to diarrhea. Such milk powder may lead to diarrhea, and may be accompanied by lower abdominal pain, fever and other symptoms. In addition, it is also possible that the diarrhea is not caused by drinking maternal milk powder, but by eating other unhygienic food that causes intestinal inflammation. It is recommended to pay attention to dietary hygiene during pregnancy, not to eat raw and cold food, and for all meat products, to cook them before consumption.