Mucus in the baby’s stool with a rotten egg smell is often associated with gastrointestinal tract dysfunction and gastrointestinal infections, but food allergies cannot be ruled out. Parents are advised to take their babies to the hospital as soon as possible for routine stool examination to clarify the diagnosis, and then for symptomatic treatment. Common causes 1, gastrointestinal tract dysfunction: baby gastrointestinal peristalsis slowed down, resulting in digestion, absorption capacity, can cause gastrointestinal tract dysfunction, resulting in food accumulation, indigestion, resulting in mucus-like stool, and with rotten egg smell; 2, gastrointestinal tract infection: mostly seen in enteritis, due to rotavirus and other invasive bacterial infection, resulting in changes in the nature of the baby’s stool, such as mucus-like stool with rotten egg smell stools, watery stools, etc., and in severe cases, pus and blood stools; 3, other factors: lactose intolerance, food allergies, etc., can also cause the baby to appear mucus-like stools with rotten egg smell symptoms. Treatment measures under the guidance of professional doctors for symptomatic treatment. Usually probiotics such as tetracycline tablets and Bacillus subtilis diphtheriae pellets can be used to regulate intestinal flora and relieve the symptoms of indigestion. The diarrhea caused by enteritis is treated with drugs such as montelukast and abscisicadotril, and water and electrolytes need to be replenished in time to prevent dehydration. If the inflammatory response is serious and the child has a temperature over 38.5°C, antipyretic drugs such as ibuprofen suspension should be used appropriately to reduce fever. In daily life, parents should pay more attention to the child’s diet and try to let the child develop good eating habits, such as not eating too much and eating at regular intervals. If the baby is breastfeeding, the mother needs to pay strict attention to the diet and avoid greasy, spicy, such as chili, fried chicken and other foods to avoid aggravating the symptoms.