Breastfed babies with lumps of soft stools may be caused by cold and indigestion, which can be improved by adjusting the mother’s diet or paying attention to keeping warm. 1. Cold: usually due to the baby’s stomach, accidentally stimulated by the cold wind, resulting in cold abdomen, so that the gastrointestinal tract dysfunction, increased secretion, and then appeared in the stool in the soft stool of the lumps of the situation. You should pay attention to keep warm and drink more hot water to help improve the condition of lumpy stools. 2. Indigestion: The quality of breastmilk may be affected by the mother’s poor diet, which may cause digestive disorders and accumulation of breastmilk, resulting in lumpy and soft stools in the baby. Mothers should pay attention to a light diet and consume a moderate amount of easy-to-digest food to help their babies have normal bowel movements. If your breastfed baby has prolonged lumpy stools that do not get better, you are advised to go to the hospital for checkups and follow the doctor’s instructions for treatment.