Breastfeeding babies with mucus in their stools may have bacterial enteritis, lactose intolerance, etc., and should seek medical treatment promptly. 1. Bacterial enteritis: due to poor resistance, babies are prone to bacterial infections, recurrent diarrhea, stool manifested as pasty stools, mucus stools, etc., and in severe cases, with pus and blood stools. 2. Lactose intolerance: Lactose intolerance is a common symptom in babies, due to the lack of lactase in breastfed babies; cannot break down and digest lactose in breast milk, resulting in an increase in lactose, which can lead to bloating, diarrhea, and mucus-like stools. If the baby mucus-like stool symptoms, continue to get no relief, should promptly consult a doctor to identify the cause of the disease, symptomatic treatment, not to give the baby blindly medication.