Parents should not judge their children’s diarrhea simply by the thinness of their stools. Many parents think that their child has diarrhea when they see their child’s stool is thin, but it is not necessarily so. Diarrhea is a group of common pediatric conditions caused by multiple pathogens and factors, characterized by an increase in the number of stools and a change in stool characteristics. The characteristics of diarrhea are “thinning” and “increasing”. The diagnosis of diarrhea is not based on the number of bowel movements per day and their characteristics, but on the increase in the number of bowel movements and the change in stool characteristics. Many breastfed children have loose stools that are relatively frequent, but this is not necessarily diarrhea. A normal breastfed infant may have 6 to 12 bowel movements per day, or once every 3 to 4 days. If the infant is eating normally, growing normally, and having normal stool tests, his bowel movements are normal. Because breast milk contains soluble fiber – oligosaccharide, which has a “light diarrhea” effect, and the intestinal tract of breastfed children is dominated by bifidobacteria, so most breastfed children have thin stools and more often. However, this is not a disadvantage of breast milk, as it not only ensures the healthy development of the infant’s intestinal tract, but also the maturity of the infant’s immune system. If a child does have diarrhea, in addition to bowel problems, there will be other uncomfortable symptoms such as crying, poor eating and sleep disturbance, and weight gain will also be affected. Parents should not judge their child’s diarrhea simply by the thinness of his or her stool.