1. Definition and symptoms of infant diarrhea 1.1 Definition 1.2 Symptoms Infant diarrhea refers to an intestinal disease in which infants and young children have increased stool frequency and thin, watery or bloody mucus. The main symptoms include abdominal discomfort, loss of appetite, fever, etc. In severe cases, dehydration, weight loss and other problems may occur. 2. Causes of infant diarrhea 2.1 Viral infection 2.2 Bacterial infection 2.3 Parasitic infection 2.4 Improper diet There are many causes of infant diarrhea, the most common of which is infection. Including microbial infections such as various bacteria, viruses, and parasites, as well as intestinal infections caused by improper diet