There are more causes of fever and stomach pain in babies, such as acute gastroenteritis, acute appendicitis, mesenteric lymphadenitis, gastrointestinal flu, etc. It is important to determine which cause is caused by different symptomatic manifestations in order to treat the symptoms. It occurs after upper respiratory tract infection, with sore throat, tiredness and discomfort, followed by abdominal pain, nausea, vomiting, fever, abdominal pain around the umbilicus and right lower abdomen, with paroxysmal attacks, pressure pain and rebound pain, and irregular pain points; appendicitis can also have fever with abdominal pain, usually metastatic right lower abdominal pain, and there can be obvious pressure pain in the appendix area; gastrointestinal flu It is mainly caused by a virus called “Coxsackie”, accompanied by bacterial mixed infections, also known as “vomiting epiglottitis” in medicine, its symptoms are: stomach distension, abdominal pain, vomiting, diarrhea, defecation several times a day, body feeling weak. In severe cases, it can lead to dehydration, electrolyte disorders and destruction of the immune system. Treatment with antidiarrheal drugs will not relieve the disease, but will delay it. Acute gastroenteritis abdominal pain is usually not accompanied by fever, and there are usually symptoms of nausea, vomiting, and diarrhea, and the main points of differentiation from other diseases are the consumption of unclean food or contaminated water, and the need for stool culture testing. Although the symptoms of these diseases are different, it is difficult to identify them based on your own experience alone. Therefore, if your baby has a fever accompanied by stomach pain, you need to go to the hospital and let your doctor examine it to clarify the cause.