Drinking milk with diarrhea on an empty stomach, most of which is a case of gastrointestinal dysfunction, has three causes, as follows: 1, poor digestion caused by poor absorption of its own gastrointestinal function, causing hypertonic things such as milk, resulting in absorption disorders caused by diarrhea situation. 2, the material composition of the milk itself is prone to the characteristics of indigestion, especially in the case of intolerance to milk, prone to diarrhea 3, if you drink colder milk, or if you have cold, cold leading to gastroenteritis symptoms, generally when drinking milk can also appear diarrhea more times. So if you have diarrhea when drinking milk on an empty stomach, it is best to pay more attention to taking it after scalding or after a meal. If it is accompanied by intestinal dysfunction, actively give symptomatic treatment with drugs that improve gastrointestinal dynamics. If the repeated diarrhea is not relieved, it is better to improve the routine stool examination to further assist the diagnosis and treatment.