Usually, it is normal for an infant not to have a bowel movement for a day, but it should be analyzed in the context of the infant’s mental state and other symptoms. There are some individual differences in the function of the gastrointestinal tract of infants, with some infants having 1-3 bowel movements a day and others having only one bowel movement in 2-3 days. If an infant does not have a bowel movement a day, but is in good spirits, eats milk in a normal amount and frequency, and has no other discomfort, no special treatment is usually needed and is a normal physiological phenomenon. However, if an infant has had frequent bowel movements for a long time and suddenly does not have a bowel movement for a day, accompanied by crying and restlessness, abdominal pain, abdominal fullness, and inability to pass gas normally, or if the infant still does not have a bowel movement for several days in a row, parents need to promptly take the child to the pediatric department or pediatric gastroenterology department for examination. In daily life, parents should give the infant warm water and massage the abdomen clockwise to promote gastrointestinal peristalsis and help the infant pass stools.