1. Definition and Symptoms of Diarrhea Diarrhea refers to an increase in the number of defecation times per day, an increase in the amount of stool, a thin or watery texture, and is accompanied by uncomfortable symptoms such as irritation during defecation and burning in the anus. Infant diarrhea is often accompanied by fever, vomiting, loss of appetite and other symptoms. 2. Causes of diarrhea in 1-year-old infants 1. Infectious diarrhea: caused by bacteria, viruses or parasites, such as rotavirus, E. coli, etc. 2. Non-infectious diarrhea: caused by food allergies, intestinal dysplasia, etc. 3. Antibiotic-associated diarrhea: caused by the impact of antibiotics on intestinal flora. 3. Prevention and treatment methods 1. Maintain