Stomach pain and fever in 3-year-old children may be associated with gastrointestinal colds and acute gastroenteritis. Gastrointestinal colds are caused by coxsackie virus infection or may be accompanied by bacterial infection. Common symptoms are abdominal pain, vomiting, diarrhea, more bowel movements in a day, and feeling weak. In severe cases, it can lead to dehydration, electrolyte disorders, and fever. Most children with acute gastroenteritis have gastrointestinal symptoms caused by poor diet, lack of hygiene or spoiled food. Its clinical manifestations are stomach pain, vomiting, diarrhea, and in severe cases fever, increased blood count, paroxysmal abdominal pain and even shock. 3-year-old children with stomach pain and fever, there may also be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.