1. Causes of diarrhea in babies 1.1 Dietary problems 1.2 Immature digestion 1.3 Viral infection 1.4 Bacterial infection 1.5 Allergic reaction Diarrhea in babies is a very common phenomenon, but there are many causes of this condition. First of all, dietary problems are one of the main causes of diarrhea in babies, especially after adding complementary foods. If the mother does not add complementary food in the correct way, or adds it too early or too late, it will cause indigestion and diarrhea in the baby. Secondly, because digestion is not fully developed yet, in the first few years after birth,