Diarrhea in 7-month-old babies may be caused by indigestion, improper feeding, enteritis and other reasons. Need to adjust the diet, disinfection of tableware, appropriate electrolyte supplementation to prevent dehydration, medication and so on. 1. Indigestion: Because the digestive system of 7-month-old babies is still not functioning well, it is easy to have diarrhea symptoms. Parents can adjust the diet for the child, eat less and more meals. 7-month-old babies have begun to add complementary foods, add complementary foods parents should be gradual, do not add too many kinds at once. 2. Improper feeding: If parents do not pay attention to the sterilization of the bottle when feeding the baby, after the bottle or nipple is contaminated, it is also easy to cause the baby to diarrhea. To avoid this, parents should pay attention to sterilizing dishes for their children. 3. Enteritis: If the baby is infected with rotavirus, it may also lead to diarrhea. Parents should actively replenish water and electrolytes for their children to prevent dehydration. If the bacterial infection, oral antibacterial drugs such as cefixime, cefdinir and other antibacterial drugs for treatment. In case of severe diarrhea, montelukast can be used to relieve the symptoms. After the 7-month-old baby has diarrhea, if after positive dietary adjustments, there is still no relief or accompanied by fever and other symptoms, it is recommended to go to the hospital in time to see a doctor. Define the cause of diarrhea, and then according to the cause of targeted treatment. The above medications should be used in accordance with medical advice.