Childhood diarrhea can be divided into two major categories based on its causes: infectious and non-infectious. Infectious factors primarily include viruses, bacteria, fungi, and parasites, among which viral and bacterial infections are most common. Viral infections are mainly seen in rotavirus infections, while bacterial infections are predominantly associated with pathogenic, invasive, toxigenic, and hemorrhagic strains of Escherichia coli. Additionally, infections from other bacteria such as Campylobacter jejuni and Salmonella also occur. Intestinal infections can also cause diarrhea, such as those accompanying upper respiratory tract infections, pneumonia, urinary tract infections, etc., because the toxins released by the infecting agents during fevers or diarrhea associated with antibiotic treatments can induce diarrhea. Non-infectious causes mainly include dietary and climatic factors.