Level 1: What is baby diarrhea? Diarrhea in a baby means that the baby\’s stool becomes thin or watery and the frequency of bowel movements increases. Under normal circumstances, it is normal to defecate 1-2 times a day, but if it exceeds 3 times or watery stools occur, parents need to pay attention. Level 2: Why does baby have diarrhea? There are many causes of diarrhea in babies. It may be caused by infection, improper diet, digestive problems or