A one-year-old breastfed baby’s irregular stools may be related to indigestion, improper diet or constipation. 1. indigestion: a year old baby in addition to breast milk, usually add some complementary foods, the baby’s gastrointestinal function is not mature, may lead to the baby indigestion, resulting in the baby’s bowel irregularity. 2. Improper diet: a year old breastfed baby irregular stools may have to do with improper feeding, usually diet to try to control the child within a certain range, to the baby to add the complementary food must be easy to digest, light, do not feed spicy stimulating things. 3. Constipation: If the breast milk baby in addition to irregular stools, there is a dry stool, the baby may have constipation, you can give the baby to rub the abdomen, promote the baby’s gastrointestinal motility. There are other reasons why a one-year-old breastfed baby’s stools are irregular, and it is recommended that parents take their children to the hospital for a comprehensive examination.