4 months old baby stools less often with a variety of factors, as follows: 1, 4 months old baby is breast-fed or formula-fed, has not yet added complementary foods, at this time, if the amount of food is less, or in daily life water to drink less, will lead to a smaller number of bowel movements. If the parents have constipation, the baby may also have a small number of stools, will be affected by some genetic factors, resulting in a small number of stools. 2, if the baby’s intestinal motility is not good, the spleen and stomach function, the number of stools will be less. If your child has a small number of stools and no bloating, crying and so on, no intervention treatment is needed, if your child has bloating because of the small number of stools, or have to eat poorer, you can take some oral medication to help gastrointestinal digestion, such as mommy’s love or probiotics and other drugs to adjust, but also with the belly button as the center, clockwise abdominal rubbing to help intestinal peristalsis.