Drinking milk generally does not cause constipation, and milk contains lactose, for lactose intolerant people, drinking milk may lead to diarrhea. Milk contains water, protein, lactose, fat and minerals and other components, drinking milk does not generally cause constipation, but may cause diarrhea. If you drink ice milk or lactose intolerant people, drinking milk will cause abdominal discomfort, diarrhea and other symptoms, generally does not lead to constipation. It should be noted that there are many causes of constipation, such as poor defecation habits and eating habits, mental and psychological factors, a variety of organic pathologies. If constipation exists, it is recommended to go to the hospital to find out the cause of the problem and carry out targeted treatment according to the cause.