1. Causes of loose stools in babies 1.1 Improper diet The baby\’s gastrointestinal tract is relatively fragile. If the diet is improper, such as overeating or eating too greasy food, it can easily cause indigestion and loose stools. 1.2 Infection with viruses or bacteria Babies whose immunity has not yet fully developed are prone to infection with various viruses and bacteria. Infection can cause damage to the intestines, causing loose stools. 1.3 Allergic reactions Some babies may be allergic to certain foods, such as milk, eggs, etc. allergic reaction