Gastroenteritis is a very common disease caused by poor dietary habits or pathogenic infections. The first factor to consider is from dietary habits, such as the consumption of contaminated or spoiled food, or irritating chemicals, which can cause gastroenteritis. Another major cause is infectious factors, such as common bacterial infections, such as E. coli and Salmonella, and also viral gastroenteritis, such as infant diarrhea caused by rotavirus infection, as well as other infectious gastroenteritis caused by fungi, parasites, etc. For gastroenteritis, we should pay sufficient attention to it and treat it promptly.