The causes of children’s tummy upset mainly include the following situations. First of all, it is caused by children suffering from acute gastroenteritis. If they don’t pay attention to the hygiene of eating, for example, if they don’t eat too cleanly or don’t wash their hands on time before eating, it will cause bacteria to enter into the digestive tract of the children, which will lead to abdominal pain in the children. Some children may also suffer from diarrhea, vomiting or even fever, which should be treated promptly with anti-infective treatment. Secondly, it is caused by children suffering from allergic purpura. If there is allergic purpura, it will not only cause pinpoint rashes on both lower limbs, but also often accompanied by symptoms of abdominal pain. Finally, if children have intestinal obstruction, appendicitis and other acute abdominal conditions, can also cause abdominal pain in children. In this case, the abdominal pain is very severe and progressively aggravated, and should be actively carried out surgical treatment.