Drinking milk powder diarrhea during pregnancy may be caused by lactose intolerance or gastrointestinal diseases. 1. Lactose intolerance: If the body belongs to the lactose intolerant body, it will lead to the body of lactase enzyme secretion is less, in the pregnancy intake of milk powder and other dairy products, the body can not be milk powder lactose digestion and decomposition, which will cause abdominal pain, diarrhea occurs. 2. Gastrointestinal diseases: If there are acute gastroenteritis, gastric ulcer and other gastrointestinal diseases, the body may not be able to fully digest and absorb the food ingested, resulting in a greater stimulation of the body, and in severe cases, accompanied by abdominal pain, vomiting occurs. Pregnant women during pregnancy should eat more food rich in protein, such as eggs, lean pork, soy products, milk and so on. You also need to supplement shrimp, fish, liver, oats, walnuts, peanuts and other foods, eat more fresh vegetables and fruits, to ensure that the intake of food nutritionally balanced, to avoid a single nutrient. Drinking milk powder diarrhea during pregnancy may also have other causes, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.