Children’s frequent cries of stomach pain may be related to mesenteric lymphadenitis, gastrointestinal diseases, functional abdominal pain syndrome and other causes. 1. Mesenteric lymphadenitis: after infecting the human body with bacteria, viruses and parasites, the pathogens themselves and their toxins reach the mesenteric lymph nodes along the blood circulation, causing lymph node hyperplasia, congestion and edema, which can lead to the symptoms of abdominal pain. 2. Gastrointestinal diseases: such as gastroenteritis, chronic inflammation of the gastrointestinal mucosa, which can be manifested as dyspepsia, abdominal pain, abdominal distension and other symptoms. 3. Functional abdominal pain syndrome: abdominal pain is the prominent symptom, which may be accompanied by other gastrointestinal symptoms such as nausea. Parents are advised to take their children to the hospital in time to clarify the cause of the disease and standardize the treatment under the guidance of the doctor.