If a newborn baby has no stool for five days is a normal situation, it needs to be analyzed according to the situation: 1, it is a normal phenomenon, if the amount of milk drunk is relatively small, the mental state is also relatively good, play is normal, growth and development is also normal, this situation is considered normal and does not require special treatment. The vast majority of appropriate increase the amount of milk feeding, stool will slowly discharge; 2, abnormal state, if five days no stool, and will appear crying and restless, sleep is not solid, etc., mainly due to constipation, can take probiotics to regulate the treatment. Commonly used probiotics can be used small Pfeiffer Kang, Mamia, these probiotics can regulate the disorder of intestinal flora, which is conducive to the adjustment of gastrointestinal dysfunction, the stool is not quite normal also has a significant improvement effect.