Mucus stool in infants may be due to physiological factors, or it may be related to lactose intolerance, bacterial enteritis, indigestion and other factors. 1. Physiological factors: after babies eat milk, breast milk will be digested and absorbed through the intestines, and at the same time, the mucous membrane of the intestines will also secrete a little mucous membrane and excrete with the stool, as long as there is not much mucous, and there are no other symptoms, it is a normal situation, and there is no need for special treatment. 2. Lactose intolerance: Some infants have non-infectious diarrhea caused by lactase secretion in the body, which cannot completely digest and decompose lactose in breast milk or cow’s milk, and may have mucus stools or even bloody stools. 3. Bacterial enteritis: Bacterial enteritis not only leads to mucus stools, but also accompanied by abdominal pain and fever. 4. Indigestion: Babies who do not pay attention to the feeding pattern and feeding position may also have the above symptoms. There may be other reasons for mucus stools in infants, so it is recommended to go to the hospital in time for relevant examinations to clarify the cause of the disease and then actively treat the symptoms.