What are the causes of abdominal pain with diarrhoea in infants and children?

It is most commonly seen in acute gastroenteritis caused by overeating or eating irritating or unclean food, infectious enteritis caused by rotavirus or adenovirus, protozoa, bacteria, and improper feeding care such as irregular and irregular feeding, excessive sugar or fat intake, and sudden food changes.
It is also seen in diseases such as gastrointestinal metaplasia, malabsorption syndrome, inflammatory bowel disease and acute necrotizing enterocolitis.