The reasons that cause a newborn baby to have no stool for two days include the following: 1. caused by insufficient milk intake. If a newborn starts out due to the lack of breast milk and thus the intake of breast milk is not enough. Breast milk in the child’s gastrointestinal tract will be fully absorbed, the child’s intestinal tract formed very little food residue, the child’s stool frequency is significantly less, the child may appear 2-3 days before a stool situation. In response to this situation, parents should promptly give the child an appropriate increase in the amount of milk feeding; 2, due to intestinal flora disorders. Because the newborn’s intestinal flora is not fully established in balance, the child may also have gastrointestinal dysfunction, resulting in two days without stool.