1. Causes of infant diarrhea 1.1 Diarrhea caused by viral infection 1.2 Diarrhea caused by bacterial infection 1.3 Diarrhea caused by food allergy Infant diarrhea refers to infants and young children who have watery or mucus-like stools during defecation, usually accompanied by stomachache, fever, Symptoms such as loss of appetite. There are many causes of diarrhea in babies, the most common of which are infections and food allergies. 1.1 Diarrhea caused by viral infection Viral infection is one of the most common causes of diarrhea in infants and young children. This type of diarrhea is usually accompanied by vomiting, fever, and malaise