There is no exact maximum number of days for babies to save their tummies. However, most of them are 3 to 5 days, and some of them can be up to about 1 week, and the specific situation varies from person to person. For infants who are exclusively breastfed, the phenomenon of diarrhea may easily occur, mainly manifested as the infant does not relieve the stool for several days, but there is no discomfort, and the milk is normal, and when the stool is defecated, the color of the stool is normal, and the defecation is not strenuous. In general, the diarrhea of the infant may last for 3 to 5 days, and then relieve by itself without treatment. However, there are some infants who have tummy troubles for a longer period of time, which may be up to 1 week or so, and parents should pay attention to observe their infants. If the baby’s tummy time is relatively long and is not accompanied by bloating, crying or other uncomfortable symptoms, there is usually no need to intervene too much. However, if the baby develops obvious discomfort during the process of tummy time, it is recommended to consult the pediatrician in the hospital.